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technology</title> <meta name="description" content="Search results for: electrolysis technology"> <meta name="keywords" content="electrolysis technology"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="electrolysis technology"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 7784</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: electrolysis technology</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7784</span> A Study of the Alumina Distribution in the Lab-Scale Cell during Aluminum Electrolysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Olga%20Tkacheva">Olga Tkacheva</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Arkhipov"> Pavel Arkhipov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexey%20Rudenko"> Alexey Rudenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Yurii%20Zaikov"> Yurii Zaikov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aluminum electrolysis process in the conventional cryolite-alumina electrolyte with cryolite ratio of 2.7 was carried out at an initial temperature of 970 °C and the anode current density of 0.5 A/cm<sup>2</sup> in a 15A lab-scale cell in order to study the formation of the side ledge during electrolysis and the alumina distribution between electrolyte and side ledge. The alumina contained 35.97% α-phase and 64.03% γ-phase with the particles size in the range of 10-120 μm. The cryolite ratio and the alumina concentration were determined in molten electrolyte during electrolysis and in frozen bath after electrolysis. The side ledge in the electrolysis cell was formed only by the 13<sup>th</sup> hour of electrolysis. With a slight temperature decrease a significant increase in the side ledge thickness was observed. The basic components of the side ledge obtained by the XRD phase analysis were Na<sub>3</sub>AlF<sub>6</sub>, Na<sub>5</sub>Al<sub>3</sub>F<sub>14</sub>, Al<sub>2</sub>O<sub>3</sub>, and NaF<sup>.</sup>5CaF<sub>2</sub><sup>.</sup>AlF<sub>3</sub>. As in the industrial cell, the increased alumina concentration in the side ledge formed on the cell walls and at the ledge-electrolyte-aluminum three-phase boundary during aluminum electrolysis in the lab cell was found (FTP No 05.604.21.0239, IN RFMEFI60419X0239). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alumina%20distribution" title="alumina distribution">alumina distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=aluminum%20electrolyzer" title=" aluminum electrolyzer"> aluminum electrolyzer</a>, <a href="https://publications.waset.org/abstracts/search?q=cryolie-alumina%20electrolyte" title=" cryolie-alumina electrolyte"> cryolie-alumina electrolyte</a>, <a href="https://publications.waset.org/abstracts/search?q=side%20ledge" title=" side ledge"> side ledge</a> </p> <a href="https://publications.waset.org/abstracts/118301/a-study-of-the-alumina-distribution-in-the-lab-scale-cell-during-aluminum-electrolysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/118301.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">273</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7783</span> The Prospect of Producing Hydrogen by Electrolysis of Idle Discharges of Water from Reservoirs and Recycling of Waste-Gas Condensates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Inom%20Sh.%20Normatov">Inom Sh. Normatov</a>, <a href="https://publications.waset.org/abstracts/search?q=Nurmakhmad%20Shermatov"> Nurmakhmad Shermatov</a>, <a href="https://publications.waset.org/abstracts/search?q=Rajabali%20Barotov"> Rajabali Barotov</a>, <a href="https://publications.waset.org/abstracts/search?q=Rano%20Eshankulova"> Rano Eshankulova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The results of the studies for the hydrogen production by the application of water electrolysis and plasma-chemical processing of gas condensate-waste of natural gas production methods are presented. Thin coating covers the electrode surfaces in the process of water electrolysis. Therefore, water for electrolysis was first exposed to electrosedimentation. The threshold voltage is shifted to a lower value compared with the use of electrodes made of stainless steel. At electrolysis of electrosedimented water by use of electrodes from stainless steel, a significant amount of hydrogen is formed. Pyrolysis of gas condensates in the atmosphere of a nitrogen was followed by the formation of acetylene (3-7 vol.%), ethylene (4-8 vol.%), and pyrolysis carbon (10-15 wt.%). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrolyze" title="electrolyze">electrolyze</a>, <a href="https://publications.waset.org/abstracts/search?q=gascondensate" title=" gascondensate"> gascondensate</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen" title=" hydrogen"> hydrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=pyrolysis" title=" pyrolysis"> pyrolysis</a> </p> <a href="https://publications.waset.org/abstracts/57794/the-prospect-of-producing-hydrogen-by-electrolysis-of-idle-discharges-of-water-from-reservoirs-and-recycling-of-waste-gas-condensates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57794.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">310</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7782</span> Effect of Leaks in Solid Oxide Electrolysis Cells Tested for Durability under Co-Electrolysis Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Megha%20Rao">Megha Rao</a>, <a href="https://publications.waset.org/abstracts/search?q=S%C3%B8ren%20H.%20Jensen"> Søren H. Jensen</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiufu%20Sun"> Xiufu Sun</a>, <a href="https://publications.waset.org/abstracts/search?q=Anke%20Hagen"> Anke Hagen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mogens%20B.%20Mogensen"> Mogens B. Mogensen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solid oxide electrolysis cells have an immense potential in converting CO<sub>2</sub> and H<sub>2</sub>O into syngas during co-electrolysis operation. The produced syngas can be further converted into hydrocarbons. This kind of technology is called power-to-gas or power-to-liquid. To produce hydrocarbons via this route, durability of the cells is still a challenge, which needs to be further investigated in order to improve the cells. In this work, various nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode supported or YSZ electrolyte supported cells, cerium gadolinium oxide (CGO) barrier layer, and an oxygen electrode are investigated for durability under co-electrolysis conditions in both galvanostatic and potentiostatic conditions. While changing the gas on the oxygen electrode, keeping the fuel electrode gas composition constant, a change in the gas concentration arc was observed by impedance spectroscopy. Measurements of open circuit potential revealed the presence of leaks in the setup. It is speculated that the change in concentration impedance may be related to the leaks. Furthermore, the cells were also tested under pressurized conditions to find an inter-play between the leak rate and the pressure. A mathematical modeling together with electrochemical and microscopy analysis is presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=co-electrolysis" title="co-electrolysis">co-electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=leaks" title=" leaks"> leaks</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20concentration%20arc" title=" gas concentration arc"> gas concentration arc</a> </p> <a href="https://publications.waset.org/abstracts/98653/effect-of-leaks-in-solid-oxide-electrolysis-cells-tested-for-durability-under-co-electrolysis-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98653.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7781</span> Electrolysis Ship for Green Hydrogen Production and Possible Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julian%20David%20Hunt">Julian David Hunt</a>, <a href="https://publications.waset.org/abstracts/search?q=Andreas%20Nascimento"> Andreas Nascimento</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Green hydrogen is the most environmental, renewable alternative to produce hydrogen. However, an important challenge to make hydrogen a competitive energy carrier is a constant supply of renewable energy, such as solar, wind and hydropower. Given that the electricity generation potential of these sources vary seasonally and interannually, this paper proposes installing an electrolysis hydrogen production plant in a ship and move the ship to the locations where electricity is cheap, or where the seasonal potential for renewable generation is high. An example of electrolysis ship application is to produce green hydrogen with hydropower from the North region of Brazil and then sail to the Northeast region of Brazil and generate hydrogen using excess electricity from offshore wind power. The electrolysis ship concept is interesting because it has the flexibility to produce green hydrogen using the cheapest renewable electricity available in the market. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=green%20hydrogen" title="green hydrogen">green hydrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis%20ship" title=" electrolysis ship"> electrolysis ship</a>, <a href="https://publications.waset.org/abstracts/search?q=renewable%20energies" title=" renewable energies"> renewable energies</a>, <a href="https://publications.waset.org/abstracts/search?q=seasonal%20variations" title=" seasonal variations"> seasonal variations</a> </p> <a href="https://publications.waset.org/abstracts/133018/electrolysis-ship-for-green-hydrogen-production-and-possible-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/133018.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">162</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7780</span> Fused Salt Electrolysis of Rare-Earth Materials from the Domestic Ore and Preparation of Rare-Earth Hydrogen Storage Alloys</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jeong-Hyun%20Yoo">Jeong-Hyun Yoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanjung%20Kwon"> Hanjung Kwon</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung-Wook%20Cho"> Sung-Wook Cho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fused salt electrolysis was studied to make the high purity rare-earth metals using domestic rare-earth ore. The target metals of the fused salt electrolysis were Mm (Misch metal), La, Ce, Nd, etc. Fused salt electrolysis was performed with the supporting salt such as chloride and fluoride at the various temperatures and ampere. The metals made by fused salt electrolysis were analyzed to identify the phase and composition using the methods of XRD and ICP. As a result, the acquired rare-earth metals were the high purity ones which had more than 99% purity. Also, VIM (vacuum induction melting) was studied to make the kg level rare-earth alloy for the use of secondary battery and hydrogen storage. In order to indentify the physicochemical properties such as phase, impurity gas, alloy composition and hydrogen storage, the alloys were investigated. The battery characteristics were also analyzed through the various tests in the real production line of a battery company. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=domestic%20rare-earth%20ore" title="domestic rare-earth ore">domestic rare-earth ore</a>, <a href="https://publications.waset.org/abstracts/search?q=fused%20salt%20electrolysis" title=" fused salt electrolysis"> fused salt electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=rare-earth%20materials" title=" rare-earth materials"> rare-earth materials</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20storage%20alloy" title=" hydrogen storage alloy"> hydrogen storage alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=secondary%20battery" title=" secondary battery"> secondary battery</a> </p> <a href="https://publications.waset.org/abstracts/17072/fused-salt-electrolysis-of-rare-earth-materials-from-the-domestic-ore-and-preparation-of-rare-earth-hydrogen-storage-alloys" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17072.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">533</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7779</span> Hydrogen Production Using Solar Energy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20M.%20Sakr">I. M. Sakr</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20M.%20Abdelsalam"> Ali M. Abdelsalam</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20A.%20Ibrahim"> K. A. Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20A.%20El-Askary"> W. A. El-Askary</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an experimental study for hydrogen production using alkaline water electrolysis operated by solar energy. Two methods are used and compared for separation between the cathode and anode, which are acrylic separator and polymeric membrane. Further, the effects of electrolyte concentration, solar insolation, and space between the pair of electrodes on the amount of hydrogen produced and consequently on the overall electrolysis efficiency are investigated. It is found that the rate of hydrogen production increases using the polymeric membrane installed between the electrodes. The experimental results show also that, the performance of alkaline water electrolysis unit is dominated by the electrolyte concentration and the gap between the electrodes. Smaller gaps between the pair of electrodes are demonstrated to produce higher rates of hydrogen with higher system efficiency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title="hydrogen production">hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20electrolysis" title=" water electrolysis"> water electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title=" solar energy"> solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=concentration" title=" concentration"> concentration</a> </p> <a href="https://publications.waset.org/abstracts/62050/hydrogen-production-using-solar-energy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62050.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7778</span> Effect of Current Density, Temperature and Pressure on Proton Exchange Membrane Electrolyser Stack</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Na%20Li">Na Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Samuel%20Simon%20Araya"> Samuel Simon Araya</a>, <a href="https://publications.waset.org/abstracts/search?q=S%C3%B8ren%20Knudsen%20K%C3%A6r"> Søren Knudsen Kær</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the effects of operating parameters of different current density, temperature and pressure on the performance of a proton exchange membrane (PEM) water electrolysis stack. A 7-cell PEM water electrolysis stack was assembled and tested under different operation modules. The voltage change and polarization curves under different test conditions, namely current density, temperature and pressure, were recorded. Results show that higher temperature has positive effect on overall stack performance, where temperature of 80 ℃ improved the cell performance greatly. However, the cathode pressure and current density has little effect on stack performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PEM%20electrolysis%20stack" title="PEM electrolysis stack">PEM electrolysis stack</a>, <a href="https://publications.waset.org/abstracts/search?q=current%20density" title=" current density"> current density</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure" title=" pressure"> pressure</a> </p> <a href="https://publications.waset.org/abstracts/131951/effect-of-current-density-temperature-and-pressure-on-proton-exchange-membrane-electrolyser-stack" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/131951.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">201</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7777</span> Comprehensive Analysis and Optimization of Alkaline Water Electrolysis for Green Hydrogen Production: Experimental Validation, Simulation Study, and Cost Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Umair%20Ahmed">Umair Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Bin%20Irfan"> Muhammad Bin Irfan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study focuses on designing and optimization of an alkaline water electrolyser for the production of green hydrogen. The aim is to enhance the durability and efficiency of this technology while simultaneously reducing the cost associated with the production of green hydrogen. The experimental results obtained from the alkaline water electrolyser are compared with simulated results using Aspen Plus software, allowing a comprehensive analysis and evaluation. To achieve the aforementioned goals, several design and operational parameters are investigated. The electrode material, electrolyte concentration, and operating conditions are carefully selected to maximize the efficiency and durability of the electrolyser. Additionally, cost-effective materials and manufacturing techniques are explored to decrease the overall production cost of green hydrogen. The experimental setup includes a carefully designed alkaline water electrolyser, where various performance parameters (such as hydrogen production rate, current density, and voltage) are measured. These experimental results are then compared with simulated data obtained using Aspen Plus software. The simulation model is developed based on fundamental principles and validated against the experimental data. The comparison between experimental and simulated results provides valuable insight into the performance of an alkaline water electrolyser. It helps to identify the areas where improvements can be made, both in terms of design and operation, to enhance the durability and efficiency of the system. Furthermore, the simulation results allow cost analysis providing an estimate of the overall production cost of green hydrogen. This study aims to develop a comprehensive understanding of alkaline water electrolysis technology. The findings of this research can contribute to the development of more efficient and durable electrolyser technology while reducing the cost associated with this technology. Ultimately, these advancements can pave the way for a more sustainable and economically viable hydrogen economy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title="sustainable development">sustainable development</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20energy" title=" green energy"> green energy</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20hydrogen" title=" green hydrogen"> green hydrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis%20technology" title=" electrolysis technology"> electrolysis technology</a> </p> <a href="https://publications.waset.org/abstracts/169108/comprehensive-analysis-and-optimization-of-alkaline-water-electrolysis-for-green-hydrogen-production-experimental-validation-simulation-study-and-cost-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169108.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7776</span> Thermo-Economic Evaluation of Sustainable Biogas Upgrading via Solid-Oxide Electrolysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ligang%20Wang">Ligang Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Theodoros%20Damartzis"> Theodoros Damartzis</a>, <a href="https://publications.waset.org/abstracts/search?q=Stefan%20Diethelm"> Stefan Diethelm</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Van%20Herle"> Jan Van Herle</a>, <a href="https://publications.waset.org/abstracts/search?q=Fran%C3%A7ois%20Marechal"> François Marechal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Biogas production from anaerobic digestion of organic sludge from wastewater treatment as well as various urban and agricultural organic wastes is of great significance to achieve a sustainable society. Two upgrading approaches for cleaned biogas can be considered: (1) direct H₂ injection for catalytic CO₂ methanation and (2) CO₂ separation from biogas. The first approach usually employs electrolysis technologies to generate hydrogen and increases the biogas production rate; while the second one usually applies commercially-available highly-selective membrane technologies to efficiently extract CO₂ from the biogas with the latter being then sent afterward for compression and storage for further use. A straightforward way of utilizing the captured CO₂ is on-site catalytic CO₂ methanation. From the perspective of system complexity, the second approach may be questioned, since it introduces an additional expensive membrane component for producing the same amount of methane. However, given the circumstance that the sustainability of the produced biogas should be retained after biogas upgrading, renewable electricity should be supplied to drive the electrolyzer. Therefore, considering the intermittent nature and seasonal variation of renewable electricity supply, the second approach offers high operational flexibility. This indicates that these two approaches should be compared based on the availability and scale of the local renewable power supply and not only the technical systems themselves. Solid-oxide electrolysis generally offers high overall system efficiency, and more importantly, it can achieve simultaneous electrolysis of CO₂ and H₂O (namely, co-electrolysis), which may bring significant benefits for the case of CO₂ separation from the produced biogas. When taking co-electrolysis into account, two additional upgrading approaches can be proposed: (1) direct steam injection into the biogas with the mixture going through the SOE, and (2) CO₂ separation from biogas which can be used later for co-electrolysis. The case study of integrating SOE to a wastewater treatment plant is investigated with wind power as the renewable power. The dynamic production of biogas is provided on an hourly basis with the corresponding oxygen and heating requirements. All four approaches mentioned above are investigated and compared thermo-economically: (a) steam-electrolysis with grid power, as the base case for steam electrolysis, (b) CO₂ separation and co-electrolysis with grid power, as the base case for co-electrolysis, (c) steam-electrolysis and CO₂ separation (and storage) with wind power, and (d) co-electrolysis and CO₂ separation (and storage) with wind power. The influence of the scale of wind power supply is investigated by a sensitivity analysis. The results derived provide general understanding on the economic competitiveness of SOE for sustainable biogas upgrading, thus assisting the decision making for biogas production sites. The research leading to the presented work is funded by European Union’s Horizon 2020 under grant agreements n° 699892 (ECo, topic H2020-JTI-FCH-2015-1) and SCCER BIOSWEET. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biogas%20upgrading" title="biogas upgrading">biogas upgrading</a>, <a href="https://publications.waset.org/abstracts/search?q=solid-oxide%20electrolyzer" title=" solid-oxide electrolyzer"> solid-oxide electrolyzer</a>, <a href="https://publications.waset.org/abstracts/search?q=co-electrolysis" title=" co-electrolysis"> co-electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=CO%E2%82%82%20utilization" title=" CO₂ utilization"> CO₂ utilization</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20storage" title=" energy storage"> energy storage</a> </p> <a href="https://publications.waset.org/abstracts/81477/thermo-economic-evaluation-of-sustainable-biogas-upgrading-via-solid-oxide-electrolysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81477.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">155</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7775</span> Control System Design for a Simulated Microbial Electrolysis Cell</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pujari%20Muruga">Pujari Muruga</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20K.%20Radhakrishnan"> T. K. Radhakrishnan</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Samsudeen"> N. Samsudeen </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen is considered as the most important energy carrier and fuel of the future because of its high energy density and zero emission properties. Microbial Electrolysis Cell (MEC) is a new and promising approach for hydrogen production from organic matter, including wastewater and other renewable resources. By utilizing anode microorganism activity, MEC can produce hydrogen gas with smaller voltages (as low as 0.2 V) than those required for electrolytic hydrogen production ( ≥ 1.23 V). The hydrogen production processes of the MEC reactor are very nonlinear and highly complex because of the presence of microbial interactions and highly complex phenomena in the system. Increasing the hydrogen production rate and lowering the energy input are two important challenges of MEC technology. The mathematical model of the MEC is based on material balance with the integration of bioelectrochemical reactions. The main objective of the research is to produce biohydrogen by selecting the optimum current and controlling applied voltage to the MEC. Precise control is required for the MEC reactor, so that the amount of current required to produce hydrogen gas can be controlled according to the composition of the substrate in the reactor. Various simulation tests involving multiple set-point changes disturbance and noise rejection were performed to evaluate the performance using PID controller tuned with Ziegler Nichols settings. Simulation results shows that other good controller can provide better control effect on the MEC system, so that higher hydrogen production can be obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microbial%20electrolysis%20cell" title="microbial electrolysis cell">microbial electrolysis cell</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title=" hydrogen production"> hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=applied%20voltage" title=" applied voltage"> applied voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=PID%20controller" title=" PID controller"> PID controller</a> </p> <a href="https://publications.waset.org/abstracts/71610/control-system-design-for-a-simulated-microbial-electrolysis-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71610.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">247</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7774</span> Current Characteristic of Water Electrolysis to Produce Hydrogen, Alkaline, and Acid Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ekki%20Kurniawan">Ekki Kurniawan</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusuf%20Nur%20Jayanto"> Yusuf Nur Jayanto</a>, <a href="https://publications.waset.org/abstracts/search?q=Erna%20Sugesti"> Erna Sugesti</a>, <a href="https://publications.waset.org/abstracts/search?q=Efri%20Suhartono"> Efri Suhartono</a>, <a href="https://publications.waset.org/abstracts/search?q=Agus%20Ganda%20Permana"> Agus Ganda Permana</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaspar%20Hasudungan"> Jaspar Hasudungan</a>, <a href="https://publications.waset.org/abstracts/search?q=Jangkung%20Raharjo"> Jangkung Raharjo</a>, <a href="https://publications.waset.org/abstracts/search?q=Rintis%20Manfaati"> Rintis Manfaati</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this research is to study the current characteristic of the electrolysis of mineral water to produce hydrogen, alkaline water, and acid water. Alkaline and hydrogen water are believed to have health benefits. Alkaline water containing hydrogen can be an anti-oxidant that captures free radicals, which will increase the immune system. In Indonesia, there are two existing types of alkaline water producing equipment, but the installation is complicated, and the price is relatively expensive. The electrolysis process is slow (6-8 hours) since they are locally made using 311 VDC full bridge rectifier power supply. This paper intends to discuss how to make hydrogen and alkaline water by a simple portable mineral water ionizer. This is an electrolysis device that is easy to carry and able to separate ions of mineral water into acidic and alkaline water. With an electric field, positive ions will be attracted to the cathode, while negative ions will be attracted to the anode. The circuit equivalent can be depicted as RLC transient ciruit. The diode component ensures that the electrolytic current is direct current. Switch S divides the switching times t1, t2, and t3. In the first stage up to t1, the electrolytic current increases exponentially, as does the inductor charging current (L). The molecules in drinking water experience magnetic properties. The direction of the dipole ions, which are random in origin, will regularly flare with the direction of the electric field. In the second stage up to t2, the electrolytic current decreases exponentially, just like the charging current of a capacitor (C). In the 3rd stage, start t3 until it tends to be constant, as is the case with the current flowing through the resistor (R). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=current%20electrolysis" title="current electrolysis">current electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral%20water" title=" mineral water"> mineral water</a>, <a href="https://publications.waset.org/abstracts/search?q=ions" title=" ions"> ions</a>, <a href="https://publications.waset.org/abstracts/search?q=alkaline%20and%20acid%20waters" title=" alkaline and acid waters"> alkaline and acid waters</a>, <a href="https://publications.waset.org/abstracts/search?q=inductor" title=" inductor"> inductor</a>, <a href="https://publications.waset.org/abstracts/search?q=capacitor" title=" capacitor"> capacitor</a>, <a href="https://publications.waset.org/abstracts/search?q=resistor" title=" resistor"> resistor</a> </p> <a href="https://publications.waset.org/abstracts/160529/current-characteristic-of-water-electrolysis-to-produce-hydrogen-alkaline-and-acid-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160529.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">113</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7773</span> The Impact of Low-Concentrated Acidic Electrolyzed Water on Foodborne Pathogens</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ewa%20Brychcy">Ewa Brychcy</a>, <a href="https://publications.waset.org/abstracts/search?q=Natalia%20Ulbin-Figlewicz"> Natalia Ulbin-Figlewicz</a>, <a href="https://publications.waset.org/abstracts/search?q=Dominika%20Kulig"> Dominika Kulig</a>, <a href="https://publications.waset.org/abstracts/search?q=%C5%BBaneta%20Kr%C3%B3l"> Żaneta Król</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrzej%20Jarmoluk"> Andrzej Jarmoluk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Acidic electrolyzed water (AEW) is an alternative with environmentally friendly broad spectrum microbial decontamination. It is produced by membrane electrolysis of a dilute NaCl solution in water ionizers. The aim of the study was to evaluate the effectiveness of low-concentrated AEW in reducing selected foodborne pathogens and to examine its bactericidal effect on cellular structures of Escherichia coli. E. coli and S. aureus cells were undetectable after 10 minutes of contact with electrolyzed salt solutions. Non-electrolyzed solutions did not inhibit the growth of bacteria. AE water was found to destroy the cellular structures of the E. coli. The use of more concentrated salt solutions and prolonged electrolysis time from 5 to 10 minutes resulted in a greater changes of rods shape as compared to the control and non-electrolyzed NaCl solutions. This research showed that low-concentrated acid electrolyzed water is an effective method to significantly reduce pathogenic microorganisms and indicated its potential application for decontamination of meat. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acidic%20electrolyzed%20water" title="acidic electrolyzed water">acidic electrolyzed water</a>, <a href="https://publications.waset.org/abstracts/search?q=foodborne%20pathogens" title=" foodborne pathogens"> foodborne pathogens</a>, <a href="https://publications.waset.org/abstracts/search?q=meat%20decontamination" title=" meat decontamination"> meat decontamination</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20electrolysis" title=" membrane electrolysis"> membrane electrolysis</a> </p> <a href="https://publications.waset.org/abstracts/7517/the-impact-of-low-concentrated-acidic-electrolyzed-water-on-foodborne-pathogens" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7517.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">494</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7772</span> Matlab/Simulink Simulation of Solar Energy Storage System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mustafa%20A.%20Al-Refai">Mustafa A. Al-Refai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the energy storage technologies that can potentially enhance the use of solar energy. Water electrolysis systems are seen as the principal means of producing a large amount of hydrogen in the future. Starting from the analysis of the models of the system components, a complete simulation model was realized in the Matlab-Simulink environment. Results of the numerical simulations are provided. The operation of electrolysis and photovoltaic array combination is verified at various insulation levels. It is pointed out that solar cell arrays and electrolysers are producing the expected results with solar energy inputs that are continuously varying. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrolyzer" title="electrolyzer">electrolyzer</a>, <a href="https://publications.waset.org/abstracts/search?q=simulink" title=" simulink"> simulink</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title=" solar energy"> solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=storage%20system" title=" storage system"> storage system</a> </p> <a href="https://publications.waset.org/abstracts/6669/matlabsimulink-simulation-of-solar-energy-storage-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6669.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">435</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7771</span> Beneficiation of Dye Sensitized Solar Cell as Energy Saving from Apple Skin with TiO2 Electrolysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Astari%20Indarsari">Astari Indarsari</a>, <a href="https://publications.waset.org/abstracts/search?q=Bastian%20B.%20Purba"> Bastian B. Purba</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Fadlilah"> Muhammad Fadlilah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In Indonesian climates that have the tropic climate, one of the potential energy sources is coming from solar energy. From the solar energy, we can convert it into the others energy, such as electrical energy. In this topic, we want to do the research about Dye Sensitized Solar Cell (DSSC). The materials that we use as sensitizer is anthocyanin that we extract from apple skin, because the anthocyanin is one of the most effective as a sensitizer for DSSC. The variable in this research is pH. The pH that we used are pH 0,5; pH 1; pH 1,5; pH 2; pH 2,5. The method is electrolysis, and we use TiO2 as sensitized material. The hypothesis from this research is the smaller pH can make higher the efficiency of the absorbent of the solar energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anthocyanin" title="anthocyanin">anthocyanin</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2" title=" TiO2"> TiO2</a>, <a href="https://publications.waset.org/abstracts/search?q=DSSC" title=" DSSC"> DSSC</a>, <a href="https://publications.waset.org/abstracts/search?q=apple%20skin" title=" apple skin"> apple skin</a> </p> <a href="https://publications.waset.org/abstracts/57912/beneficiation-of-dye-sensitized-solar-cell-as-energy-saving-from-apple-skin-with-tio2-electrolysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57912.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">293</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7770</span> Optimization of Operational Parameters and Design of an Electrochlorination System to Produce Naclo</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pablo%20Ignacio%20Hern%C3%A1ndez%20Arango">Pablo Ignacio Hernández Arango</a>, <a href="https://publications.waset.org/abstracts/search?q=Niels%20Lindemeyer"> Niels Lindemeyer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chlorine, as Sodium Hypochlorite (NaClO) solution in water, is an effective, worldwide spread, and economical substance to eliminate germs in the water. The disinfection potential of chlorine lies in its ability to degrade the outer surfaces of bacterial cells and viruses. This contribution reports the main parameters of the brine electrolysis for the production of NaClO, which is afterward used for the disinfection of water either for drinking or recreative uses. Herein, the system design was simulated, optimized, build, and tested based on titanium electrodes. The process optimization considers the whole process, from the salt (NaCl) dilution tank in order to maximize its operation time util the electrolysis itself in order to maximize the chlorine production reducing the energy and raw material (salt and water) consumption. One novel idea behind this optimization process is the modification of the flow pattern inside the electrochemical reactors. The increasing turbulence and residence time impact positively the operations figures. The operational parameters, which are defined in this study were compared and benchmarked with the parameters of actual commercial systems in order to validate the pertinency of those results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrolysis" title="electrolysis">electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20disinfection" title=" water disinfection"> water disinfection</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20hypochlorite" title=" sodium hypochlorite"> sodium hypochlorite</a>, <a href="https://publications.waset.org/abstracts/search?q=process%20optimization" title=" process optimization"> process optimization</a> </p> <a href="https://publications.waset.org/abstracts/146099/optimization-of-operational-parameters-and-design-of-an-electrochlorination-system-to-produce-naclo" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146099.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">128</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7769</span> Hydrogen Production Using an Anion-Exchange Membrane Water Electrolyzer: Mathematical and Bond Graph Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hugo%20Daneluzzo">Hugo Daneluzzo</a>, <a href="https://publications.waset.org/abstracts/search?q=Christelle%20Rabbat"> Christelle Rabbat</a>, <a href="https://publications.waset.org/abstracts/search?q=Alan%20Jean-Marie"> Alan Jean-Marie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water electrolysis is one of the most advanced technologies for producing hydrogen and can be easily combined with electricity from different sources. Under the influence of electric current, water molecules can be split into oxygen and hydrogen. The production of hydrogen by water electrolysis favors the integration of renewable energy sources into the energy mix by compensating for their intermittence through the storage of the energy produced when production exceeds demand and its release during off-peak production periods. Among the various electrolysis technologies, anion exchange membrane (AEM) electrolyser cells are emerging as a reliable technology for water electrolysis. Modeling and simulation are effective tools to save time, money, and effort during the optimization of operating conditions and the investigation of the design. The modeling and simulation become even more important when dealing with multiphysics dynamic systems. One of those systems is the AEM electrolysis cell involving complex physico-chemical reactions. Once developed, models may be utilized to comprehend the mechanisms to control and detect flaws in the systems. Several modeling methods have been initiated by scientists. These methods can be separated into two main approaches, namely equation-based modeling and graph-based modeling. The former approach is less user-friendly and difficult to update as it is based on ordinary or partial differential equations to represent the systems. However, the latter approach is more user-friendly and allows a clear representation of physical phenomena. In this case, the system is depicted by connecting subsystems, so-called blocks, through ports based on their physical interactions, hence being suitable for multiphysics systems. Among the graphical modelling methods, the bond graph is receiving increasing attention as being domain-independent and relying on the energy exchange between the components of the system. At present, few studies have investigated the modelling of AEM systems. A mathematical model and a bond graph model were used in previous studies to model the electrolysis cell performance. In this study, experimental data from literature were simulated using OpenModelica using bond graphs and mathematical approaches. The polarization curves at different operating conditions obtained by both approaches were compared with experimental ones. It was stated that both models predicted satisfactorily the polarization curves with error margins lower than 2% for equation-based models and lower than 5% for the bond graph model. The activation polarization of hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) were behind the voltage loss in the AEM electrolyzer, whereas ion conduction through the membrane resulted in the ohmic loss. Therefore, highly active electro-catalysts are required for both HER and OER while high-conductivity AEMs are needed for effectively lowering the ohmic losses. The bond graph simulation of the polarisation curve for operating conditions at various temperatures has illustrated that voltage increases with temperature owing to the technology of the membrane. Simulation of the polarisation curve can be tested virtually, hence resulting in reduced cost and time involved due to experimental testing and improved design optimization. Further improvements can be made by implementing the bond graph model in a real power-to-gas-to-power scenario. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title="hydrogen production">hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=anion-exchange%20membrane" title=" anion-exchange membrane"> anion-exchange membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolyzer" title=" electrolyzer"> electrolyzer</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling" title=" mathematical modeling"> mathematical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=multiphysics%20modeling" title=" multiphysics modeling"> multiphysics modeling</a> </p> <a href="https://publications.waset.org/abstracts/165397/hydrogen-production-using-an-anion-exchange-membrane-water-electrolyzer-mathematical-and-bond-graph-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165397.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">91</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7768</span> Life Cycle Assessment of Rare Earth Metals Production: Hotspot Analysis of Didymium Electrolysis Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sandra%20H.%20Fukurozaki">Sandra H. Fukurozaki</a>, <a href="https://publications.waset.org/abstracts/search?q=Andre%20L.%20N.%20Silva"> Andre L. N. Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Joao%20B.%20F.%20Neto"> Joao B. F. Neto</a>, <a href="https://publications.waset.org/abstracts/search?q=Fernando%20J.%20G.%20Landgraf"> Fernando J. G. Landgraf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays, the rare earth (RE) metals play an important role in emerging technologies that are crucial for the decarbonisation of the energy sector. Their unique properties have led to increasing clean energy applications, such as wind turbine generators, and hybrid and electric vehicles. Despite the substantial media coverage that has recently surrounded the mining and processing of rare earth metals, very little quantitative information is available concerning their subsequent life stages, especially related to the metallic production of didymium (Nd-Pr) in fluoride molten salt system. Here we investigate a gate to gate scale life cycle assessment (LCA) of the didymium electrolysis based on three different scenarios of operational conditions. The product system is modeled with SimaPro Analyst 8.0.2 software, and IMPACT 2002+ was applied as an impact assessment tool. In order to develop a life cycle inventories built in software databases, patents, and other published sources together with energy/mass balance were utilized. Analysis indicates that from the 14 midpoint impact categories evaluated, the global warming potential (GWP) is the main contributors to the total environmental burden, ranging from 2.7E2 to 3.2E2 kg CO2eq/kg Nd-Pr. At the damage step assessment, the results suggest that slight changes in materials flows associated with enhancement of current efficiency (between 2.5% and 5%), could lead a reduction up to 12% and 15% of human health and climate change damage, respectively. Additionally, this paper highlights the knowledge gaps and future research efforts needing to understand the environmental impacts of Nd-Pr electrolysis process from the life cycle perspective. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=didymium%20electrolysis" title="didymium electrolysis">didymium electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20impacts" title=" environmental impacts"> environmental impacts</a>, <a href="https://publications.waset.org/abstracts/search?q=life%20cycle%20assessment" title=" life cycle assessment"> life cycle assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=rare%20earth%20metals" title=" rare earth metals"> rare earth metals</a> </p> <a href="https://publications.waset.org/abstracts/101265/life-cycle-assessment-of-rare-earth-metals-production-hotspot-analysis-of-didymium-electrolysis-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101265.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">187</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7767</span> NiFe-Type Catalysts for Anion Exchange Membrane (AEM) Electrolyzers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boldin%20Roman">Boldin Roman</a>, <a href="https://publications.waset.org/abstracts/search?q=Liliana%20Anal%C3%ADa%20Diaz"> Liliana Analía Diaz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As the hydrogen economy continues to expand, reducing energy consumption and emissions while stimulating economic growth, the development of efficient and cost-effective hydrogen production technologies is critical. Among various methods, anion exchange membrane (AEM) water electrolysis stands out due to its potential for using non-noble metal catalysts. The exploration and enhancement of non-noble metal catalysts, such as NiFe-type catalysts, are pivotal for the advancement of AEM technology, ensuring its commercial viability and environmental sustainability. NiFe-type catalysts were synthesized through electrodeposition and characterized both electrochemically and physico-chemically. Various supports, including Ni foam and Ni mesh, were used as porous transport layers (PTLs) to evaluate the effective catalyst thickness and the influence of the PTL in a 5 cm² AEM electrolyzer. This methodological approach allows for a detailed assessment of catalyst performance under operational conditions typical of industrial hydrogen production. The study revealed that electrodeposited non-noble multi-metallic catalysts maintain stable performance as anodes in AEM water electrolysis. NiFe-type catalysts demonstrated superior activity, with the NiFeCoP alloy outperforming others by delivering the lowest overpotential and the highest current density. Furthermore, the use of different PTLs showed significant effects on the electrochemical behavior of the catalysts, indicating that PTL selection is crucial for optimizing performance and efficiency in AEM electrolyzers. Conclusion: The research underscores the potential of non-noble metal catalysts in enhancing efficiency and reducing the costs of AEM electrolysers. The findings highlight the importance of catalyst and PTL optimization in developing scalable and economically viable hydrogen production technologies. Continued innovation in this area is essential for supporting the growth of the hydrogen economy and achieving sustainable energy solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AEMWE" title="AEMWE">AEMWE</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalyst" title=" electrocatalyst"> electrocatalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title=" hydrogen production"> hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20electrolysis." title=" water electrolysis."> water electrolysis.</a> </p> <a href="https://publications.waset.org/abstracts/189262/nife-type-catalysts-for-anion-exchange-membrane-aem-electrolyzers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/189262.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">27</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7766</span> Improving Alkaline Water Electrolysis by Using an Asymmetrical Electrode Cell Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gabriel%20Wosiak">Gabriel Wosiak</a>, <a href="https://publications.waset.org/abstracts/search?q=Felipe%20Staciaki"> Felipe Staciaki</a>, <a href="https://publications.waset.org/abstracts/search?q=Eryka%20Nobrega"> Eryka Nobrega</a>, <a href="https://publications.waset.org/abstracts/search?q=Ernesto%20Pereira"> Ernesto Pereira</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen is an energy carrier with potential applications in various industries. Alkaline electrolysis is a commonly used method for hydrogen production; however, its energy cost remains relatively high compared to other methods. This is due in part to interfacial pH changes that occur during the electrolysis process. Interfacial pH changes refer to the changes in pH that occur at the interface between the cathode electrode and the electrolyte solution. These changes are caused by the electrochemical reactions at both electrodes, which consume or produces hydroxide ions (OH-) from the electrolyte solution. This results in an important change in the local pH at the electrode surface, which can have several impacts on the energy consumption and durability of electrolysers. One impact of interfacial pH changes is an increase in the overpotential required for hydrogen production. Overpotential is the difference between the theoretical potential required for a reaction to occur and the actual potential that is applied to the electrodes. In the case of water electrolysis, the overpotential is caused by a number of factors, including the mass transport of reactants and products to and from the electrodes, the kinetics of the electrochemical reactions, and the interfacial pH. An increase in the interfacial pH at the anode surface in alkaline conditions can lead to an increase in the overpotential for hydrogen production. This is because the lower local pH makes it more difficult for the hydroxide ions to be oxidized. As a result, there is an increase in the required energy to the process occur. In addition to increasing the overpotential, interfacial pH changes can also lead to the degradation of the electrodes. This is because the lower pH can make the electrode more susceptible to corrosion. As a result, the electrodes may need to be replaced more frequently, which can increase the overall cost of water electrolysis. The method presented in the paper addresses the issue of interfacial pH changes by using a cell design with a different cell design, introducing the electrode asymmetry. This design helps to mitigate the pH gradient at the anode/electrolyte interface, which reduces the overpotential and improves the energy efficiency of the electrolyser. The method was tested using a multivariate approach in both laboratory and industrial current density conditions and validated the results with numerical simulations. The results demonstrated a clear improvement (11.6%) in energy efficiency, providing an important contribution to the field of sustainable energy production. The findings of the paper have important implications for the development of cost-effective and sustainable hydrogen production methods. By mitigating interfacial pH changes, it is possible to improve the energy efficiency of alkaline electrolysis and make it a more competitive option for hydrogen production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrolyser" title="electrolyser">electrolyser</a>, <a href="https://publications.waset.org/abstracts/search?q=interfacial%20pH" title=" interfacial pH"> interfacial pH</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=asymmetric%20cell" title=" asymmetric cell"> asymmetric cell</a> </p> <a href="https://publications.waset.org/abstracts/171271/improving-alkaline-water-electrolysis-by-using-an-asymmetrical-electrode-cell-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171271.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">70</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7765</span> An Exploitation of Electrical Sensors in Monitoring Pool Chlorination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fahad%20Alamoudi">Fahad Alamoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yaser%20Miaji"> Yaser Miaji </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The growing popularity of swimming pools and other activities in the water for sport, fitness, therapy or just enjoyable relaxation have led to the increased use of swimming pools and the establishment of a variety of specific-use pools such as spa pools, water slides, and more recently, hydrotherapy and wave pools. In this research, a few simple equipment is used for test, detect and alert for detection of water cleanness and pollution. YSI Photometer Systems, TDSTestr High model, Rio 12HF and Electrode A1. The researchers used electrolysis as a method of separating bonded elements and compounds by passing an electric current through them. The results which use 41 experiments show the higher the salt concentration, the more efficient the electrode and the smaller the gap between the plates, the lower the electrode voltage. Furthermore, it is proved that the larger the surface area, the lower the cell voltage and the higher current used the more chlorine produced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photometer" title="photometer">photometer</a>, <a href="https://publications.waset.org/abstracts/search?q=electrode" title=" electrode"> electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis" title=" electrolysis"> electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=swimming%20pool%20chlorination" title=" swimming pool chlorination"> swimming pool chlorination</a> </p> <a href="https://publications.waset.org/abstracts/24384/an-exploitation-of-electrical-sensors-in-monitoring-pool-chlorination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24384.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">363</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7764</span> Swimming Pool Water Chlorination Detection System Utilizing TDSTestr </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fahad%20Alamoudi">Fahad Alamoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yaser%20Miaji"> Yaser Miaji</a>, <a href="https://publications.waset.org/abstracts/search?q=Fawzy%20Jalalah"> Fawzy Jalalah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The growing popularity of swimming pools and other activities in the water for sport, fitness, therapy or just enjoyable relaxation have led to the increased use of swimming pools and the establishment of a variety of specific-use pools such as spa pools, Waterslides and more recently, hydrotherapy and wave pools. In this research a few simple equipments are used for test, Detect and alert for detection of water cleanness and pollution. YSI Photometer Systems, TDSTestr High model, rio 12HF, and Electrode A1. The researchers used electrolysis as a method of separating bonded elements and compounds by passing an electric current through them. The results which use 41 experiments show the higher the salt concentration, the more efficient the electrode and the smaller the gap between the plates and The lower the electrode voltage. Furthermore, it is proved that the larger the surface area, the lower the cell voltage and the higher current used the more chlorine produced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photometer" title="photometer">photometer</a>, <a href="https://publications.waset.org/abstracts/search?q=electrode" title=" electrode"> electrode</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis" title=" electrolysis"> electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=swimming%20pool%20chlorination" title=" swimming pool chlorination"> swimming pool chlorination</a> </p> <a href="https://publications.waset.org/abstracts/26847/swimming-pool-water-chlorination-detection-system-utilizing-tdstestr" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26847.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7763</span> Development of LSM/YSZ Composite Anode Materials for Solid Oxide Electrolysis Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christian%20C.%20Vaso">Christian C. Vaso</a>, <a href="https://publications.waset.org/abstracts/search?q=Rinlee%20Butch%20M.%20Cervera"> Rinlee Butch M. Cervera</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solid oxide electrolysis cell (SOEC) is a promising technology for hydrogen production that will contribute to the sustainable energy of the future. An important component of this SOEC is the anode material and one of the promising anode material for such application is the Sr-doped LaMnO3 (LSM) and Yttrium-stabilized ZrO2 (YSZ) composite material. In this study, LSM/YSZ with different weight percent compositions of LSM and YSZ were synthesized using solid-state reaction method. The obtained samples, 60LSM/40YSZ, 50LSM/50YSZ, and 40LSM/60YSZ, were fully characterized for its microstructure using X-ray diffraction, FTIR, and SEM/EDS. EDS analysis confirmed the elemental composition and distribution of the synthesized samples. Surface morphology of the sample using SEM exhibited a well sintered and densified samples and revealed a beveled cube-like LSM morphology while the YSZ phase appeared to have a sphere-like microstructure. Density measurements using Archimedes principle showed relative densities greater than 90%. In addition, AC impedance measurement of the synthesized samples have been investigated at intermediate temperature range (400-700 °C) in an inert and oxygen gas flow environment. At pure states, LSM exhibited a high electronic conductivity while YSZ demonstrated an ionic conductivity of 3.25 x 10-4 S/cm at 700 °C under Oxygen gas environment with calculated activation energy of 0.85eV. The composite samples were also studied and revealed that as the YSZ content of the composite electrode increases, the total conductivity decreases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20composites" title="ceramic composites">ceramic composites</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20cells" title=" fuel cells"> fuel cells</a>, <a href="https://publications.waset.org/abstracts/search?q=strontium%20lanthanum%20manganite" title=" strontium lanthanum manganite"> strontium lanthanum manganite</a>, <a href="https://publications.waset.org/abstracts/search?q=yttria%20partially-stabilized%20zirconia" title=" yttria partially-stabilized zirconia"> yttria partially-stabilized zirconia</a> </p> <a href="https://publications.waset.org/abstracts/50152/development-of-lsmysz-composite-anode-materials-for-solid-oxide-electrolysis-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50152.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">313</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7762</span> Improving Lubrication Efficiency at High Sliding Speeds by Plasma Surface Texturing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wei%20Zha">Wei Zha</a>, <a href="https://publications.waset.org/abstracts/search?q=Jingzeng%20Zhang"> Jingzeng Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chen%20Zhao"> Chen Zhao</a>, <a href="https://publications.waset.org/abstracts/search?q=Ran%20Cai"> Ran Cai</a>, <a href="https://publications.waset.org/abstracts/search?q=Xueyuan%20Nie"> Xueyuan Nie</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cathodic plasma electrolysis (CPE) is used to create surface textures on cast iron samples for improving the tribological properties. Micro craters with confined size distribution were successfully formed by CPE process. These craters can generate extra hydrodynamic pressure that separates two sliding surfaces, increase the oil film thickness and accelerate the transition from boundary to mixed lubrication. It was found that the optimal crater size was 1.7 μm, at which the maximum lubrication efficiency was achieved. The Taguchi method was used to optimize the process parameters (voltage and roughness) for CPE surface texturing. The orthogonal array and the signal-to-noise ratio were employed to study the effect of each process parameter on the coefficient of friction. The results showed that with higher voltage and lower roughness, the lower friction coefficient can be obtained, and thus the lubrication can be more efficiently used for friction reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cathodic%20plasma%20electrolysis" title="cathodic plasma electrolysis">cathodic plasma electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=friction" title=" friction"> friction</a>, <a href="https://publications.waset.org/abstracts/search?q=lubrication" title=" lubrication"> lubrication</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20surface%20texturing" title=" plasma surface texturing"> plasma surface texturing</a> </p> <a href="https://publications.waset.org/abstracts/115142/improving-lubrication-efficiency-at-high-sliding-speeds-by-plasma-surface-texturing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/115142.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">135</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7761</span> Integration of a Microbial Electrolysis Cell and an Oxy-Combustion Boiler</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ruth%20Diego">Ruth Diego</a>, <a href="https://publications.waset.org/abstracts/search?q=Luis%20M.%20Romeo"> Luis M. Romeo</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Mor%C3%A1n"> Antonio Morán</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, a study of the coupling of a Bioelectrochemical System together with an oxy-combustion boiler is carried out; specifically, it proposes to connect the combustion gas outlet of a boiler with a microbial electrolysis cell (MEC) where the CO2 from the gases are transformed into methane in the cathode chamber, and the oxygen produced in the anode chamber is recirculated to the oxy-combustion boiler. The MEC mainly consists of two electrodes (anode and cathode) immersed in an aqueous electrolyte; these electrodes are separated by a proton exchange membrane (PEM). In this case, the anode is abiotic (where oxygen is produced), and it is at the cathode that an electroactive biofilm is formed with microorganisms that catalyze the CO2 reduction reactions. Real data from an oxy-combustion process in a boiler of around 20 thermal MW have been used for this study and are combined with data obtained on a smaller scale (laboratory-pilot scale) to determine the yields that could be obtained considering the system as environmentally sustainable energy storage. In this way, an attempt is made to integrate a relatively conventional energy production system (oxy-combustion) with a biological system (microbial electrolysis cell), which is a challenge to be addressed in this type of new hybrid scheme. In this way, a novel concept is presented with the basic dimensioning of the necessary equipment and the efficiency of the global process. In this work, it has been calculated that the efficiency of this power-to-gas system based on MEC cells when coupled to industrial processes is of the same order of magnitude as the most promising equivalent routes. The proposed process has two main limitations, the overpotentials in the electrodes that penalize the overall efficiency and the need for storage tanks for the process gases. The results of the calculations carried out in this work show that certain real potentials achieve an acceptable performance. Regarding the tanks, with adequate dimensioning, it is possible to achieve complete autonomy. The proposed system called OxyMES provides energy storage without energetically penalizing the process when compared to an oxy-combustion plant with conventional CO2 capture. According to the results obtained, this system can be applied as a measure to decarbonize an industry, changing the original fuel of the oxy-combustion boiler to the biogas generated in the MEC cell. It could also be used to neutralize CO2 emissions from industry by converting it to methane and then injecting it into the natural gas grid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microbial%20electrolysis%20cells" title="microbial electrolysis cells">microbial electrolysis cells</a>, <a href="https://publications.waset.org/abstracts/search?q=oxy-combustion" title=" oxy-combustion"> oxy-combustion</a>, <a href="https://publications.waset.org/abstracts/search?q=co2" title=" co2"> co2</a>, <a href="https://publications.waset.org/abstracts/search?q=power-to-gas" title=" power-to-gas"> power-to-gas</a> </p> <a href="https://publications.waset.org/abstracts/157335/integration-of-a-microbial-electrolysis-cell-and-an-oxy-combustion-boiler" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157335.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">108</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7760</span> Iron Recovery from Red Mud as Zero-Valent Iron Metal Powder Using Direct Electrochemical Reduction Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Franky%20Michael%20Hamonangan%20Siagian">Franky Michael Hamonangan Siagian</a>, <a href="https://publications.waset.org/abstracts/search?q=Affan%20Maulana"> Affan Maulana</a>, <a href="https://publications.waset.org/abstracts/search?q=Himawan%20Tri%20Bayu%20Murti%20Petrus"> Himawan Tri Bayu Murti Petrus</a>, <a href="https://publications.waset.org/abstracts/search?q=Widi%20Astuti"> Widi Astuti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the feasibility of the direct electrowinning method was used to produce zero-valent iron from red mud. The bauxite residue sample came from the Tayan mine, Indonesia, which contains high hematite (Fe₂O₃). Before electrolysis, the samples were characterized by various analytical techniques (ICP-AES, SEM, XRD) to determine their chemical composition and mineralogy. The direct electrowinning method of red mud suspended in NaOH was introduced at low temperatures ranging from 30 - 110 °C. Variations of current density, red mud: NaOH ratio and temperature were carried out to determine the optimum operation of the direct electrowinning process. Cathode deposits and residues in electrochemical cells were analyzed using XRD, XRF, and SEM to determine the chemical composition and current recovery. The low-temperature electrolysis current efficiency on Redmud can reach 20% recovery at a current density of 920,945 A/m². The moderate performance of the process was investigated with red mud, which was attributed to the troublesome adsorption of red mud particles on the cathode, making the reduction far less efficient than that with hematite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=red%20mud" title="red mud">red mud</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20reduction" title=" electrochemical reduction"> electrochemical reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=Iron%20production" title=" Iron production"> Iron production</a>, <a href="https://publications.waset.org/abstracts/search?q=hematite" title=" hematite"> hematite</a> </p> <a href="https://publications.waset.org/abstracts/162125/iron-recovery-from-red-mud-as-zero-valent-iron-metal-powder-using-direct-electrochemical-reduction-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162125.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">75</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7759</span> Iron Recovery from Red Mud As Zero-Valent Iron Metal Powder Using Direct Electrochemical Reduction Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Franky%20Michael%20Hamonangan%20Siagian">Franky Michael Hamonangan Siagian</a>, <a href="https://publications.waset.org/abstracts/search?q=Affan%20Maulana"> Affan Maulana</a>, <a href="https://publications.waset.org/abstracts/search?q=Himawan%20Tri%20Bayu%20Murti%20Petrus"> Himawan Tri Bayu Murti Petrus</a>, <a href="https://publications.waset.org/abstracts/search?q=Panut%20Mulyono"> Panut Mulyono</a>, <a href="https://publications.waset.org/abstracts/search?q=Widi%20Astuti"> Widi Astuti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the feasibility of the direct electrowinning method was used to produce zero-valent iron from red mud. The bauxite residue sample came from the Tayan mine, Indonesia, which contains high hematite (Fe₂O₃). Before electrolysis, the samples were characterized by various analytical techniques (ICP-AES, SEM, XRD) to determine their chemical composition and mineralogy. The direct electrowinning method of red mud suspended in NaOH was introduced at low temperatures ranging from 30 - 110 °C. Variations of current density, red mud: NaOH ratio and temperature were carried out to determine the optimum operation of the direct electrowinning process. Cathode deposits and residues in electrochemical cells were analyzed using XRD, XRF, and SEM to determine the chemical composition and current recovery. The low-temperature electrolysis current efficiency on Redmud can reach 20% recovery at a current density of 920,945 A/m². The moderate performance of the process was investigated with red mud, which was attributed to the troublesome adsorption of red mud particles on the cathode, making the reduction far less efficient than that with hematite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alumina" title="alumina">alumina</a>, <a href="https://publications.waset.org/abstracts/search?q=red%20mud" title=" red mud"> red mud</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20reduction" title=" electrochemical reduction"> electrochemical reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=iron%20production" title=" iron production"> iron production</a> </p> <a href="https://publications.waset.org/abstracts/162943/iron-recovery-from-red-mud-as-zero-valent-iron-metal-powder-using-direct-electrochemical-reduction-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162943.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">79</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7758</span> Nickel Oxide-Nitrogen-Doped Carbon (Ni/NiOx/NC) Derived from Pyrolysis of 2-Aminoterephthalic Acid for Electrocatalytic Oxidation of Ammonia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yu-Jen%20Shih">Yu-Jen Shih</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan-Zhang%20Lou"> Juan-Zhang Lou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nitrogenous compounds, such as NH4+/NH3 and NO3-, have become important contaminants in water resources. Excessive concentration of NH3 leads to eutrophication, which poses a threat to aquatic organisms in the environment. Electrochemical oxidation emerged as a promising water treatment technology, offering advantages such as simplicity, small-scale operation, and minimal reliance on additional chemicals. In this study, a nickel-based metal-organic framework (Ni-MOF) was synthesized using 2-amino terephthalic acid (BDC-NH2) and nickel nitrate. The Ni-MOF was further carbonized as derived nickel oxide and nitrogen-carbon composite, Ni/NiOx/NC. The nickel oxide within the 2D porous carbon texture served as active sites for ammonia oxidation. Results of characterization showed that the Ni-MOF was a hexagonal and flaky nanoparticle. With increasing carbonization temperature, the nickel ions in the organic framework re-crystallized as NiO clusters on the surfaces of the 2D carbon. The electrochemical surface area of Ni/NiOx/NC significantly increased as to improve the efficiency of ammonia oxidation. The phase transition of Ni(OH)2⇌NiOOH at around +0.8 V was the primary mediator of electron transfer. Batch electrolysis was conducted under constant current and constant potential modes. The electrolysis parameters included pyrolysis temperatures, pH, current density, initial feed concentration, and electrode potential. The constant current batch experiments indicated that via carbonization at 800 °C, Ni/NiOx/NC(800) was able to decrease the ammonium nitrogen of 50 mg-N/L to below 1 ppm within 4 hours at a current density of 3 mA/cm2 and pH 11 with negligible oxygenated nitrogen formation. The constant potential experiments confirmed that N2 nitrogen selectivity was enhanced up to 90% at +0.8 V. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20oxidation" title="electrochemical oxidation">electrochemical oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=nickel%20oxyhydroxide" title=" nickel oxyhydroxide"> nickel oxyhydroxide</a>, <a href="https://publications.waset.org/abstracts/search?q=metal-organic%20framework" title=" metal-organic framework"> metal-organic framework</a>, <a href="https://publications.waset.org/abstracts/search?q=ammonium" title=" ammonium"> ammonium</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrate" title=" nitrate"> nitrate</a> </p> <a href="https://publications.waset.org/abstracts/177586/nickel-oxide-nitrogen-doped-carbon-ninioxnc-derived-from-pyrolysis-of-2-aminoterephthalic-acid-for-electrocatalytic-oxidation-of-ammonia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177586.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">66</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7757</span> CFD Simulation and Experimental Validation of the Bubble-Induced Flow during Electrochemical Water Splitting</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gabriel%20Wosiak">Gabriel Wosiak</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeyse%20da%20Silva"> Jeyse da Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Sthefany%20S.%20Sena"> Sthefany S. Sena</a>, <a href="https://publications.waset.org/abstracts/search?q=Renato%20N.%20de%20Andrade"> Renato N. de Andrade</a>, <a href="https://publications.waset.org/abstracts/search?q=Ernesto%20Pereira"> Ernesto Pereira</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The bubble formation during hydrogen production by electrolysis and several electrochemical processes is an inherent phenomenon and can impact the energy consumption of the processes. In this work, it was reported both experimental and computational results describe the effect of bubble displacement, which, under the cases investigated, leads to the formation of a convective flow in the solution. The process is self-sustained, and a solution vortex is formed, which modifies the bubble growth and covering at the electrode surface. Using the experimental data, we have built a model to simulate it, which, with high accuracy, describes the phenomena. Then, it simulated many different experimental conditions and evaluated the effects of the boundary conditions on the bubble surface covering the surface. We have observed a position-dependent bubble covering the surface, which has an effect on the water-splitting efficiency. It was shown that the bubble covering is not uniform at the electrode surface, and using statistical analysis; it was possible to evaluate the influence of the gas type (H2 and O2), current density, and the bubble size (and cross-effects) on the covering fraction and the asymmetric behavior over the electrode surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=water%20splitting" title="water splitting">water splitting</a>, <a href="https://publications.waset.org/abstracts/search?q=bubble" title=" bubble"> bubble</a>, <a href="https://publications.waset.org/abstracts/search?q=electrolysis" title=" electrolysis"> electrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title=" hydrogen production"> hydrogen production</a> </p> <a href="https://publications.waset.org/abstracts/151356/cfd-simulation-and-experimental-validation-of-the-bubble-induced-flow-during-electrochemical-water-splitting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151356.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">100</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7756</span> High Efficient Biohydrogen Production from Cassava Starch Processing Wastewater by Two Stage Thermophilic Fermentation and Electrohydrogenesis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peerawat%20Khongkliang">Peerawat Khongkliang</a>, <a href="https://publications.waset.org/abstracts/search?q=Prawit%20Kongjan"> Prawit Kongjan</a>, <a href="https://publications.waset.org/abstracts/search?q=Tsuyoshi%20Imai"> Tsuyoshi Imai</a>, <a href="https://publications.waset.org/abstracts/search?q=Poonsuk%20Prasertsan"> Poonsuk Prasertsan</a>, <a href="https://publications.waset.org/abstracts/search?q=Sompong%20O-Thong"> Sompong O-Thong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A two-stage thermophilic fermentation and electrohydrogenesis process was used to convert cassava starch processing wastewater into hydrogen gas. Maximum hydrogen yield from fermentation stage by Thermoanaerobacterium thermosaccharolyticum PSU-2 was 248 mL H2/g-COD at optimal pH of 6.5. Optimum hydrogen production rate of 820 mL/L/d and yield of 200 mL/g COD was obtained at HRT of 2 days in fermentation stage. Cassava starch processing wastewater fermentation effluent consisted of acetic acid, butyric acid and propionic acid. The effluent from fermentation stage was used as feedstock to generate hydrogen production by microbial electrolysis cell (MECs) at an applied voltage of 0.6 V in second stage with additional 657 mL H2/g-COD was produced. Energy efficiencies based on electricity needed for the MEC were 330 % with COD removals of 95 %. The overall hydrogen yield was 800-900 mL H2/g-COD. Microbial community analysis of electrohydrogenesis by DGGE shows that exoelectrogens belong to Acidiphilium sp., Geobacter sulfurreducens and Thermincola sp. were dominated at anode. These results show two-stage thermophilic fermentation, and electrohydrogenesis process improved hydrogen production performance with high hydrogen yields, high gas production rates and high COD removal efficiency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cassava%20starch%20processing%20wastewater" title="cassava starch processing wastewater">cassava starch processing wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=biohydrogen" title=" biohydrogen"> biohydrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=thermophilic%20fermentation" title=" thermophilic fermentation"> thermophilic fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=microbial%20electrolysis%20cell" title=" microbial electrolysis cell"> microbial electrolysis cell</a> </p> <a href="https://publications.waset.org/abstracts/43009/high-efficient-biohydrogen-production-from-cassava-starch-processing-wastewater-by-two-stage-thermophilic-fermentation-and-electrohydrogenesis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43009.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">343</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7755</span> Preparation and Conductivity Measurements of LSM/YSZ Composite Solid Oxide Electrolysis Cell Anode Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christian%20C.%20Vaso">Christian C. Vaso</a>, <a href="https://publications.waset.org/abstracts/search?q=Rinlee%20Butch%20M.%20Cervera"> Rinlee Butch M. Cervera</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the most promising anode materials for solid oxide electrolysis cell (SOEC) application is the Sr-doped LaMnO<sub>3</sub> (LSM) which is known to have a high electronic conductivity but low ionic conductivity. To increase the ionic conductivity or diffusion of ions through the anode, Yttria-stabilized Zirconia (YSZ), which has good ionic conductivity, is proposed to be combined with LSM to create a composite electrode and to obtain a high mixed ionic and electronic conducting anode. In this study, composite of lanthanum strontium manganite and YSZ oxide, La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub>/Zr<sub>0.92</sub>Y<sub>0.08</sub>O<sub>2</sub> (LSM/YSZ), with different wt.% compositions of LSM and YSZ were synthesized using solid-state reaction. The obtained prepared composite samples of 60, 50, and 40 wt.% LSM with remaining wt.% of 40, 50, and 60, respectively for YSZ were fully characterized for its microstructure by using powder X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), and Scanning electron microscope/Energy dispersive spectroscopy (SEM/EDS) analyses. Surface morphology of the samples via SEM analysis revealed a well-sintered and densified pure LSM, while a more porous composite sample of LSM/YSZ was obtained. Electrochemical impedance measurements at intermediate temperature range (500-700 °C) of the synthesized samples were also performed which revealed that the 50 wt.% LSM with 50 wt.% YSZ (L50Y50) sample showed the highest total conductivity of 8.27x10<sup>-1</sup> S/cm at 600 <sup>o</sup>C with 0.22 eV activation energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramics" title="ceramics">ceramics</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20cells" title=" fuel cells"> fuel cells</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20impedance%20spectroscopy" title=" electrochemical impedance spectroscopy"> electrochemical impedance spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/60719/preparation-and-conductivity-measurements-of-lsmysz-composite-solid-oxide-electrolysis-cell-anode-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60719.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">249</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=electrolysis%20technology&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=electrolysis%20technology&page=3">3</a></li> <li class="page-item"><a class="page-link" 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