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hollow fiber membrane</title> <meta name="description" content="Search results for: ceramic hollow fiber membrane"> <meta name="keywords" content="ceramic hollow fiber membrane"> <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> 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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="ceramic hollow fiber membrane"> <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> 2828</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: ceramic hollow fiber membrane</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2828</span> Preparation of Ceramic Hollow Fiber Membranes for CO2 Capture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kai-Wei%20Huang">Kai-Wei Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yi-Feng%20Lin"> Yi-Feng Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this study is to have chemical resistance, high heat resistance and mechanical strength of ceramic hollow fiber membrane into a membrane contactor, and the combustion process is applied (Post-combustion capture) of the carbon dioxide absorption device. In this paper, we would investigate the effect of the ceramic membrane hydrophobicity to the flux of the carbon dioxide adsorption. To improve the applicability of the ceramic film. We use the dry-wet spinning method with the high temperature sintering process for preparing a ceramic hollow fiber membranes to increase the filling density per unit volume of the membrane. The PESf/Al2O3 ratio of 1:5 was prepared ceramic hollow fibers membrane precursors and investigate the relationship of the different sintering temperature to the membrane pore size and porosity. It can be found that the membrane via the sintering temperature of 1400 °C prepared with the highest porosity of 70%, while the membrane via the sintering temperature of 1600 °C prepared although has a minimum porosity of about 54%, but also has the smallest average pore size of about 0.2 μm. The hydrophilic ceramic hollow fiber membranes which after high-temperature sintering were changed into hydrophobic successfully via the 0.02M FAS modifier. The hydrophobic ceramic hollow fiber membranes with different sintering temperature, the membrane which was prepared via 1400 °C sintering has the highest carbon dioxide adsorption about 4.2 × 10-4 (mole/m2s). The membrane prepared via 1500 °C sintering has the carbon dioxide adsorption about 3.8 × 10-3 (mole/m2s),and the membrane prepared via 1600 °C sintering has the lowest carbon dioxide adsorption about 2.68 × 10-3 (mole/m2s).All of them have reusability and in long time operation, the membrane which was prepared via 1600 °C sintering has the smallest pores and also could operate for three days. After the test, the 1600 °C sintering ceramic hollow fiber membrane was most suitable for the factory. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20dioxide%20capture" title="carbon dioxide capture">carbon dioxide capture</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20contactor" title=" membrane contactor"> membrane contactor</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title=" ceramic membrane"> ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fiber%20membrane" title=" ceramic hollow fiber membrane"> ceramic hollow fiber membrane</a> </p> <a href="https://publications.waset.org/abstracts/21521/preparation-of-ceramic-hollow-fiber-membranes-for-co2-capture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21521.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">2827</span> Separation of CO2 Using MFI-Alumina Nanocomposite Hollow Fiber Ion-Exchanged with Alkali Metal Cation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Alshebani">A. Alshebani</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Swesi"> Y. Swesi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mrayed"> S. Mrayed</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Altaher"> F. Altaher</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Musbah"> I. Musbah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cs-type nanocomposite zeolite membrane was successfully synthesized on an alumina ceramic hollow fibre with a mean outer diameter of 1.7 mm; cesium cationic exchange test was carried out inside test module with mean wall thickness of 230 μm and an average crossing pore size smaller than 0.2 μm. Separation factor of n-butane/H2 obtained indicate that a relatively high quality closed to 20. Maxwell-Stefan modeling provides an equivalent thickness lower than 1 µm. To compare the difference an application to CO2/N2 separation has been achieved, reaching separation factors close to (4,18) before and after cation exchange on H-zeolite membrane formed within the pores of a ceramic alumina substrate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MFI%20membrane" title="MFI membrane">MFI membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title=" nanocomposite"> nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fibre" title=" ceramic hollow fibre"> ceramic hollow fibre</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2" title=" CO2"> CO2</a>, <a href="https://publications.waset.org/abstracts/search?q=ion-exchange" title=" ion-exchange"> ion-exchange</a> </p> <a href="https://publications.waset.org/abstracts/12639/separation-of-co2-using-mfi-alumina-nanocomposite-hollow-fiber-ion-exchanged-with-alkali-metal-cation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12639.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">299</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">2826</span> Experimental Analysis on the Thermal Performance of Vacuum Membrane Distillation Module Using Polyvinylidene Fluoride Hollow Fiber Membrane</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hong-Jin%20Joo">Hong-Jin Joo</a>, <a href="https://publications.waset.org/abstracts/search?q=Hee-Yoel%20Kwak"> Hee-Yoel Kwak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vacuum Membrane Distillation (VMD) uses pressure lower than the atmospheric pressure. The feed seawater is capable of producing more vapor at the same temperature than Direct Contact Membrane Distillation (DCMD), Air Gap Membrane Distillation (AGMD) or Sweep Gas Membrane Distillation (SGMD). It is advantageous because it is operable at a lower temperature than other membrane distillations. However, no commercial product is available that uses the VMD method, as it is still in the study stage. In this study, therefore, thermal performance test according to the feed water conditions was performed prior to both construction of the demonstration plant, which uses VMD module of the capacity of 400m³/d in South Korea, and commercialization of VMD module with hollow fiber membrane. Such study was performed by designing and constructing the VMD module of the capacity of 2 m³/day which utilizes the polyvinylidene fluoride (PVDF) hollow fiber membrane. The results obtained from the VMD module manufactured by ECONITY Co., Ltd in South Korea, showed that the maximum performance ratio (PR) value of 0.904, feed water temperature of 75 ℃, and the flow rate of 8 m3/h. As the temperature of and flow rate of the feed water increased, the PR value of the VMD module also increased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20distillation" title="membrane distillation">membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20membrane%20distillation" title=" vacuum membrane distillation"> vacuum membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber%20membrane" title=" hollow fiber membrane"> hollow fiber membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=desalination" title=" desalination"> desalination</a> </p> <a href="https://publications.waset.org/abstracts/76714/experimental-analysis-on-the-thermal-performance-of-vacuum-membrane-distillation-module-using-polyvinylidene-fluoride-hollow-fiber-membrane" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76714.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">210</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">2825</span> Separation of CO2 Using MFI-Alumina Nanocomposite Hollow Fibre Ion-Exchanged with Alkali Metal Cation </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Alshebani">A. Alshebani</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Swesi"> Y. Swesi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mrayed"> S. Mrayed</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Altaher"> F. Altaher</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Musbah"> I. Musbah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cs-type nanocomposite zeolite membrane was successfully synthesized on a alumina ceramic hollow fibre with a mean outer diameter of 1.7 mm, cesium cationic exchange test was carried out inside test module with mean wall thickness of 230 μm and an average crossing pore size smaller than 0.2 μm. Separation factor of n-butane/H2 obtained indicate that a relatively high quality closed to 20. Maxwell-Stefan modeling provides an equivalent thickness lower than 1 µm. To compare the difference an application to CO2/N2 separation has been achieved, reaching separation factors close to (4,18) before and after cation exchange on H-zeolite membrane formed within the pores of a ceramic alumina substrate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MFI%20membrane" title="MFI membrane">MFI membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2" title=" CO2"> CO2</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title=" nanocomposite"> nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fibre" title=" ceramic hollow fibre"> ceramic hollow fibre</a>, <a href="https://publications.waset.org/abstracts/search?q=ion-exchange" title=" ion-exchange"> ion-exchange</a> </p> <a href="https://publications.waset.org/abstracts/20708/separation-of-co2-using-mfi-alumina-nanocomposite-hollow-fibre-ion-exchanged-with-alkali-metal-cation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20708.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">483</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">2824</span> Preparation and Removal Properties of Hollow Fiber Membranes for Drinking Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seung%20Moon%20Woo">Seung Moon Woo</a>, <a href="https://publications.waset.org/abstracts/search?q=Youn%20Suk%20Chung"> Youn Suk Chung</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang%20Yong%20Nam"> Sang Yong Nam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present time, we need advanced water treatment technology for separation of virus and bacteria in effluent which occur epidemic and waterborne diseases. Water purification system is mainly divided into two categorizations like reverse osmosis (RO) and ultrafiltration (UF). Membrane used in these systems requires higher durability because of operating in harsh condition. Of these, the membrane using in UF system has many advantages like higher efficiency and lower energy consume for water treatment compared with RO system. In many kinds of membrane, hollow fiber type membrane is possible to make easily and to get optimized property by control of various spinning conditions such as temperature of coagulation bath, concentration of polymer, addition of additive, air gap and internal coagulation. In this study, polysulfone hollow fiber membrane was successfully prepared by phase inversion method for separation of virus and bacteria. When we prepare the hollow fiber membrane, we controlled various factors such as the polymer concentration, air gap and internal coagulation to investigate effect to membrane property. Morphology of surface and cross section of membrane were measured by field emission scanning electron microscope (FE-SEM). Water flux of membrane was measured using test modules. Mean pore diameter of membrane was calculated using rejection of polystyrene (PS) latex beads for separation of virus and bacteria. Flux and mean flow pore diameter of prepared membrane show 1.5 LPM, 0.03 μm at 1.0 kgf/cm2. The bacteria and virus removal performance of prepared UF membranes were over 6 logs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber%20membrane" title="hollow fiber membrane">hollow fiber membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=drinking%20water" title=" drinking water"> drinking water</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafiltration" title=" ultrafiltration"> ultrafiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a> </p> <a href="https://publications.waset.org/abstracts/55533/preparation-and-removal-properties-of-hollow-fiber-membranes-for-drinking-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55533.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">248</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">2823</span> Effect of Air Gap Distance on the Structure of PVDF Hollow Fiber Membrane Contactors for Physical CO2 Absorption</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Shiri">J. Shiri</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Mansourizadeh"> A. Mansourizadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Faghih"> F. Faghih</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Vaez"> H. Vaez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, porous polyvinylidene fluoride (PVDF) hollow fiber membranes are fabricated via a wet phase-inversion Process and used in the gas–liquid membrane contactor for physical CO2 absorption. Effect of different air gap on the structure and CO2 flux of the membrane was investigated. The hollow fibers were prepared using the wet spinning process using a dope solution containing PVDF/NMP/Licl (18%, 78%, 4%) at the extrusion rate of 4.5ml/min and air gaps of 0, 7, 15cm. Water was used as internal and external coagulants. Membranes were characterized using various techniques such as Field Emission Scanning Electron Microscopy (FESEM), Gas permeation test, Critical Water Entry Pressure (CEPw) to select the best membrane structure for Co2 absorption. The characterization results showed that the prepared membrane at which air gap possess small pore size with high surface porosity and wetting resistance, which are favorable for gas absorption application air gap increased, CEPw had a decrease, but the N2 permeation was decreased. Surface porosity and also Co2 absorption was increased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=porous%20PVDF%20hollow%20fiber%20membrane" title="porous PVDF hollow fiber membrane">porous PVDF hollow fiber membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2%20absorption" title=" CO2 absorption"> CO2 absorption</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20inversion" title=" phase inversion"> phase inversion</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20gap" title=" air gap"> air gap</a> </p> <a href="https://publications.waset.org/abstracts/13420/effect-of-air-gap-distance-on-the-structure-of-pvdf-hollow-fiber-membrane-contactors-for-physical-co2-absorption" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13420.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">391</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">2822</span> Separation of Mercury(Ii) from Petroleum Produced Water via Hollow Fiber Supported Liquid Membrane and Mass Transfer Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Srestha%20Chaturabul">Srestha Chaturabul</a>, <a href="https://publications.waset.org/abstracts/search?q=Wanchalerm%20Srirachat"> Wanchalerm Srirachat</a>, <a href="https://publications.waset.org/abstracts/search?q=Thanaporn%20Wannachod"> Thanaporn Wannachod</a>, <a href="https://publications.waset.org/abstracts/search?q=Prakorn%20Ramakul"> Prakorn Ramakul</a>, <a href="https://publications.waset.org/abstracts/search?q=Ura%20Pancharoen"> Ura Pancharoen</a>, <a href="https://publications.waset.org/abstracts/search?q=Soorathep%20Kheawhom"> Soorathep Kheawhom </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The separation of mercury(II) from petroleum-produced water from the Gulf of Thailand was carried out using a hollow fiber supported liquid membrane system (HFSLM). Optimum parameters for feed pretreatment were 0.2 M HCl, 4% (v/v) Aliquat 336 for extractant and 0.1 M thiourea for stripping solution. The best percentage obtained for extraction was 99.73% and for recovery 90.11%, respectively. The overall separation efficiency noted was 94.92% taking account of both extraction and recovery prospects. The model for this separation developed along a combined flux principle i.e. convection–diffusion–kinetic. The results showed excellent agreement with theoretical data at an average standard deviation of 1.5% and 1.8%, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=separation" title="separation">separation</a>, <a href="https://publications.waset.org/abstracts/search?q=mercury%28ii%29" title=" mercury(ii)"> mercury(ii)</a>, <a href="https://publications.waset.org/abstracts/search?q=petroleum%20produced%20water" title=" petroleum produced water"> petroleum produced water</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber" title=" hollow fiber"> hollow fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20membrane" title=" liquid membrane"> liquid membrane</a> </p> <a href="https://publications.waset.org/abstracts/29570/separation-of-mercuryii-from-petroleum-produced-water-via-hollow-fiber-supported-liquid-membrane-and-mass-transfer-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29570.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">298</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">2821</span> Study of a Developed Model Describing a Vacuum Membrane Distillation Unit Coupled to Solar Energy </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Khaled">Fatma Khaled</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaoula%20Hidouri"> Khaoula Hidouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Bechir%20Chaouachi"> Bechir Chaouachi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Desalination using solar energy coupled with membrane techniques such as vacuum membrane distillation (VMD) is considered as an interesting alternative for the production of pure water. During this work, a developed model of a polytetrafluoroethylene (PTFE) hollow fiber membrane module of a VMD unit of seawater was carried out. This simulation leads to establishing a comparison between the effects of two different equations of the vaporization latent heat on the membrane surface temperature and on the unit productivity. Besides, in order to study the effect of putting membrane modules in series on the outlet fluid temperature and on the productivity of the process, a simulation was executed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vacuum%20membrane%20distillation" title="vacuum membrane distillation">vacuum membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20module" title=" membrane module"> membrane module</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20temperature" title=" membrane temperature"> membrane temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=productivity" title=" productivity"> productivity</a> </p> <a href="https://publications.waset.org/abstracts/107225/study-of-a-developed-model-describing-a-vacuum-membrane-distillation-unit-coupled-to-solar-energy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107225.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">190</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">2820</span> Preparation of hydrophobic silica membranes supported on alumina hollow fibers for pervaporation applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ami%20Okabe">Ami Okabe</a>, <a href="https://publications.waset.org/abstracts/search?q=Daisuke%20Gondo"> Daisuke Gondo</a>, <a href="https://publications.waset.org/abstracts/search?q=Akira%20Ogawa"> Akira Ogawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasuhisa%20Hasegawa"> Yasuhisa Hasegawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Koichi%20Sato"> Koichi Sato</a>, <a href="https://publications.waset.org/abstracts/search?q=Sadao%20Araki"> Sadao Araki</a>, <a href="https://publications.waset.org/abstracts/search?q=Hideki%20Yamamoto"> Hideki Yamamoto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane separation draws attention as the energy-saving technology. Pervaporation (PV) uses hydrophobic ceramic membranes to separate organic compounds from industrial wastewaters. PV makes it possible to separate organic compounds from azeotropic mixtures and from aqueous solutions. For the PV separation of low concentrations of organics from aqueous solutions, hydrophobic ceramic membranes are expected to have high separation performance compared with that of conventional hydrophilic membranes. Membrane separation performance is evaluated based on the pervaporation separation index (PSI), which depends on both the separation factor and the permeate flux. Ingenuity is required to increase the PSI such that the permeate flux increases without reducing the separation factor or to increase the separation factor without reducing the flux. A thin separation layer without defects and pinholes is required. In addition, it is known that the flux can be increased without reducing the separation factor by reducing the diffusion resistance of the membrane support. In a previous study, we prepared hydrophobic silica membranes by a molecular templating sol−gel method using cetyltrimethylammonium bromide (CTAB) to form pores suitable for permitting the passage of organic compounds through the membrane. We separated low-concentration organics from aqueous solutions by PV using these membranes. In the present study, hydrophobic silica membranes were prepared on a porous alumina hollow fiber support that is thinner than the previously used alumina support. Ethyl acetate (EA) is used in large industrial quantities, so it was selected as the organic substance to be separated. Hydrophobic silica membranes were prepared by dip-coating porous alumina supports with a -alumina interlayer into a silica sol containing CTAB and vinyltrimethoxysilane (VTMS) as the silica precursor. Membrane thickness increases with the lifting speed of the sol in the dip-coating process. Different thicknesses of the γ-alumina layer were prepared by dip-coating the support into a boehmite sol at different lifting speeds (0.5, 1, 3, and 5 mm s-1). Silica layers were subsequently formed by dip-coating using an immersion time of 60 s and lifting speed of 1 mm s-1. PV measurements of the EA (5 wt.%)/water system were carried out using VTMS hydrophobic silica membranes prepared on -alumina layers of different thicknesses. Water and EA flux showed substantially constant value despite of the change of the lifting speed to form the γ-alumina interlayer. All prepared hydrophobic silica membranes showed the higher PSI compared with the hydrophobic membranes using the previous alumina support of hollow fiber. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20separation" title="membrane separation">membrane separation</a>, <a href="https://publications.waset.org/abstracts/search?q=pervaporation" title=" pervaporation"> pervaporation</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobic" title=" hydrophobic"> hydrophobic</a>, <a href="https://publications.waset.org/abstracts/search?q=silica" title=" silica"> silica</a> </p> <a href="https://publications.waset.org/abstracts/35530/preparation-of-hydrophobic-silica-membranes-supported-on-alumina-hollow-fibers-for-pervaporation-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35530.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">404</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">2819</span> The Extraction and Stripping of Hg(II) from Produced Water via Hollow Fiber Contactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dolapop%20Sribudda">Dolapop Sribudda</a>, <a href="https://publications.waset.org/abstracts/search?q=Ura%20Pancharoen"> Ura Pancharoen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The separation of Hg(II) from produced water by hollow fiber contactors (HFC) was investigation. This system included of two hollow fiber modules in the series connecting. The first module used for the extraction reaction and the second module for stripping reaction. Aliquat336 extractant was fed from the organic reservoirs into the shell side of the first hollow fiber module and continuous to the shell side of the second module. The organic liquid was continuously feed recirculate and back to the reservoirs. The feed solution was pumped into the lumen (tube side) of the first hollow fiber module. Simultaneously, the stripping solution was pumped in the same way in tube side of the second module. The feed and stripping solution was fed which had a counter current flow. Samples were kept in the outlet of feed and stripping solution for 1 hour and characterized concentration of Hg(II) by Inductively Couple Plasma Atomic Emission Spectroscopy (ICP-AES). Feed solution was produced water from natural gulf of Thailand. The extractant was Aliquat336 dissolved in kerosene diluent. Stripping solution used was nitric acid (HNO3) and thiourea (NH2CSNH2). The effect of carrier concentration and type of stripping solution were investigated. Results showed that the best condition were 10 % (v/v) Aliquat336 and 1.0 M NH2CSNH2. At the optimum condition, the extraction and stripping of Hg(II) were 98% and 44.2%, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hg%28II%29" title="Hg(II)">Hg(II)</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber%20contactor" title=" hollow fiber contactor"> hollow fiber contactor</a>, <a href="https://publications.waset.org/abstracts/search?q=produced%20water" title=" produced water"> produced water</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater%20treatment" title=" wastewater treatment"> wastewater treatment</a> </p> <a href="https://publications.waset.org/abstracts/27276/the-extraction-and-stripping-of-hgii-from-produced-water-via-hollow-fiber-contactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27276.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">403</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">2818</span> Preconcentration and Determination of Cyproheptadine in Biological Samples by Hollow Fiber Liquid Phase Microextraction Coupled with High Performance Liquid Chromatography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sh.%20Najari%20Moghadam">Sh. Najari Moghadam</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Qomi"> M. Qomi</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Raofie"> F. Raofie</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Khadiv"> J. Khadiv</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a liquid phase microextraction by hollow fiber (HF-LPME) combined with high performance liquid chromatography-UV detector was applied to preconcentrate and determine trace levels of Cyproheptadine in human urine and plasma samples. Cyproheptadine was extracted from 10 mL alkaline aqueous solution (pH: 9.81) into an organic solvent (n-octnol) which was immobilized in the wall pores of a hollow fiber. Then, it was back-extracted into an acidified aqueous solution (pH: 2.59) located inside the lumen of the hollow fiber. This method is simple, efficient and cost-effective. It is based on pH gradient and differences between two aqueous phases. In order to optimize the HF-LPME, some affecting parameters including the pH of donor and acceptor phases, the type of organic solvent, ionic strength, stirring rate, extraction time and temperature were studied and optimized. Under optimal conditions enrichment factor, limit of detection (LOD) and relative standard deviation (RSD(%), n=3) were up to 112, 15 μg.L−1 and 2.7, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biological%20samples" title="biological samples">biological samples</a>, <a href="https://publications.waset.org/abstracts/search?q=cyproheptadine" title=" cyproheptadine"> cyproheptadine</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber" title=" hollow fiber"> hollow fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20phase%20microextraction" title=" liquid phase microextraction"> liquid phase microextraction</a> </p> <a href="https://publications.waset.org/abstracts/12240/preconcentration-and-determination-of-cyproheptadine-in-biological-samples-by-hollow-fiber-liquid-phase-microextraction-coupled-with-high-performance-liquid-chromatography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12240.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">287</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">2817</span> Ceramic Membrane Filtration Technologies for Oilfield Produced Water Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehrdad%20Ebrahimi">Mehrdad Ebrahimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Oliver%20Schmitz"> Oliver Schmitz</a>, <a href="https://publications.waset.org/abstracts/search?q=Axel%20Schmidt"> Axel Schmidt</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20Czermak"> Peter Czermak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> “Produced water” (PW) is any fossil water that is brought to the surface along with crude oil or natural gas. By far, PW is the largest waste stream by volume associated with oil and gas production operations. Due to the increasing volume of waste all over the world in the current decade, the outcome and effect of discharging PW on the environment has lately become a significant issue of environmental concerns. Therefore, there is a need for new technologies for PW treatment due to increase focus on water conservation and environmental regulation. The use of membrane processes for treatment of PW has several advantages over many of the traditional separation techniques. In oilfield produced water treatment with ceramic membranes, process efficiency is characterized by the specific permeate flux and by the oil separation performance. Apart from the membrane properties, the permeate flux during filtration of oily wastewaters is known to be strongly dependent on the constituents of the feed solution, as well as on process conditions, e.g. trans-membrane pressure (TMP) and cross-flow velocity (CFV). The research project presented in these report describes the application of different ceramic membrane filtration technologies for the efficient treatment of oil-field produced water and different model oily solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title="ceramic membrane">ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20fouling" title=" membrane fouling"> membrane fouling</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20rejection" title=" oil rejection"> oil rejection</a>, <a href="https://publications.waset.org/abstracts/search?q=produced%20water%20treatment" title=" produced water treatment"> produced water treatment</a> </p> <a href="https://publications.waset.org/abstracts/121611/ceramic-membrane-filtration-technologies-for-oilfield-produced-water-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121611.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">183</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">2816</span> Ultrathin NaA Zeolite Membrane in Solvent Recovery: Preparation and Application </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Eng%20Toon%20Saw">Eng Toon Saw</a>, <a href="https://publications.waset.org/abstracts/search?q=Kun%20Liang%20Ang"> Kun Liang Ang</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20He"> Wei He</a>, <a href="https://publications.waset.org/abstracts/search?q=Xuecheng%20Dong"> Xuecheng Dong</a>, <a href="https://publications.waset.org/abstracts/search?q=Seeram%20Ramakrishna"> Seeram Ramakrishna</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solvent recovery process is receiving utmost attention in recent year due to the scarcity of natural resource and consciousness of circular economy in chemical and pharmaceutical manufacturing process. Solvent dehydration process is one of the important process to recover and to purify the solvent for reuse. Due to the complexity of solvent waste or wastewater effluent produced in pharmaceutical industry resulting the wastewater treatment process become complicated, thus an alternative solution is to recover the valuable solvent in solvent waste. To treat solvent waste and to upgrade solvent purity, membrane pervaporation process is shown to be a promising technology due to the energy intensive and low footprint advantages. Ceramic membrane is adopted as solvent dehydration membrane owing to the chemical and thermal stability properties as compared to polymeric membrane. NaA zeolite membrane is generally used as solvent dehydration process because of its narrow and distinct pore size and high hydrophilicity. NaA zeolite membrane has been mainly applied in alcohol dehydration in fermentation process. At this stage, the membrane performance exhibits high separation factor with low flux using tubular ceramic membrane. Thus, defect free and ultrathin NaA membrane should be developed to increase water flux. Herein, we report a simple preparation protocol to prepare ultrathin NaA zeolite membrane supported on tubular ceramic membrane by controlling the seed size synthesis, seeding methods and conditions, ceramic substrate surface pore size selection and secondary growth conditions. The microstructure and morphology of NaA zeolite membrane will be examined and reported. Moreover, the membrane separation performance and stability will also be reported in isopropanol dehydration, ketone dehydration and ester dehydration particularly for the application in pharmaceutical industry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title="ceramic membrane">ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=NaA%20zeolite" title=" NaA zeolite"> NaA zeolite</a>, <a href="https://publications.waset.org/abstracts/search?q=pharmaceutical%20industry" title=" pharmaceutical industry"> pharmaceutical industry</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent%20recovery" title=" solvent recovery"> solvent recovery</a> </p> <a href="https://publications.waset.org/abstracts/96273/ultrathin-naa-zeolite-membrane-in-solvent-recovery-preparation-and-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96273.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">245</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">2815</span> Effects of SRT and HRT on Treatment Performance of MBR and Membrane Fouling </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20I.%20Aida%20Isma">M. I. Aida Isma</a>, <a href="https://publications.waset.org/abstracts/search?q=Azni%20Idris"> Azni Idris</a>, <a href="https://publications.waset.org/abstracts/search?q=Rozita%20Omar"> Rozita Omar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20R.%20Putri%20Razreena"> A. R. Putri Razreena </a> </p> <p class="card-text"><strong>Abstract:</strong></p> 40L of hollow fiber membrane bioreactor with solids retention times (SRT) of 30, 15 and 4 days were setup for treating synthetic wastewater at hydraulic retention times (HRT) of 12, 8 and 4 hours. The objectives of the study were to investigate the effects of SRT and HRT on membrane fouling. A comparative analysis was carried out for physiochemical quality parameters (turbidity, suspended solids, COD, NH3-N and PO43-). Scanning electron microscopy (SEM), energy diffusive X-ray (EDX) analyzer and particle size distribution (PSD) were used to characterize the membrane fouling properties. The influence of SRT on the quality of effluent, activated sludge quality, and membrane fouling were also correlated. Lower membrane fouling and slower rise in trans-membrane pressure (TMP) were noticed at the longest SRT and HRT of 30d and 12h, respectively. Increasing SRT results in noticeable reduction of dissolved organic matters. The best removal efficiencies of COD, TSS, NH3-N and PO43- were 93%, 98%, 80% and 30% respectively. The high HRT with shorter SRT induced faster fouling rate. The main fouling resistance was cake layer. The most severe membrane fouling was observed at SRT and HRT of 4 and 12, respectively with thickness cake layer of 17 μm as reflected by higher TMP, lower effluent removal and thick sludge cake layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title="membrane bioreactor">membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=SRT" title=" SRT"> SRT</a>, <a href="https://publications.waset.org/abstracts/search?q=HRT" title=" HRT"> HRT</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling" title=" fouling"> fouling</a> </p> <a href="https://publications.waset.org/abstracts/6152/effects-of-srt-and-hrt-on-treatment-performance-of-mbr-and-membrane-fouling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6152.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">525</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">2814</span> Sustainable Manufacturing and Performance of Ceramic Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Obsi%20Terfasa">Obsi Terfasa</a>, <a href="https://publications.waset.org/abstracts/search?q=Bhanupriya%20Das"> Bhanupriya Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Mithilish%20Passawan"> Mithilish Passawan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The large-scale application of microbial fuel cell (MFC) technology is significantly hindered by the high cost of the commonly used proton exchange membrane, Nafion. This has led to the recent development of ceramic membranes using various clay minerals. This study evaluates the characteristics and potential use of a new ceramic membrane made from potter’s clay © mixed with different proportions (0, 5, 10 wt%) of fly ash (FA), labeled as CFA0, CFA5, CFA10, for cost-effective and sustainable MFC use. Among these, the CFA10 membrane demonstrated superior quality with a fine pore size distribution (average 0.41 μm), which supports higher water uptake and reduced oxygen diffusion. Its oxygen mass transfer coefficient was 4.13 ± 0.13 × 10⁻⁴ cm/s, about 40% lower than the control. X-ray diffraction analysis revealed that the CFA membrane is rich in quartz, which enhances proton conductance and water retention. Electrochemical kinetics studies, including cyclic voltammetry and electrochemical impedance spectroscopy (EIS), also confirmed the effectiveness of the CFA10 membrane in MFC, showing a peak current output of 15.35 mA and low ohmic resistance (78.2 Ω). The novel CFA10 ceramic membrane, incorporating coal fly ash, a waste material, shows promise for high MFC performance at a significantly reduced cost (96%), making it suitable for sustainable scaling up of the technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title="ceramic membrane">ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=Coulombic%20efficiency" title=" Coulombic efficiency"> Coulombic efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-chemical%20kinetics" title=" electro-chemical kinetics"> electro-chemical kinetics</a>, <a href="https://publications.waset.org/abstracts/search?q=fly%20ash" title=" fly ash"> fly ash</a>, <a href="https://publications.waset.org/abstracts/search?q=proton%20conductivity" title=" proton conductivity"> proton conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=microbial%20fuel%20cell" title=" microbial fuel cell"> microbial fuel cell</a> </p> <a href="https://publications.waset.org/abstracts/190549/sustainable-manufacturing-and-performance-of-ceramic-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190549.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">36</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">2813</span> Fabrication and Characterization Analysis of La-Sr-Co-Fe-O Perovskite Hollow Fiber Catalyst for Oxygen Removal in Landfill Gas</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seong%20Woon%20Lee">Seong Woon Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Soo%20Min%20Lim"> Soo Min Lim</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Sik%20Jeong"> Sung Sik Jeong</a>, <a href="https://publications.waset.org/abstracts/search?q=Jung%20Hoon%20Park"> Jung Hoon Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The atmospheric concentration of greenhouse gas (GHG, Green House Gas) is increasing continuously as a result of the combustion of fossil fuels and industrial development. In response to this trend, many researches have been conducted on the reduction of GHG. Landfill gas (LFG, Land Fill Gas) is one of largest sources of GHG emissions containing the methane (CH₄) as a major constituent and can be considered renewable energy sources as well. In order to use LFG by connecting to the city pipe network, it required a process for removing impurities. In particular, oxygen must be removed because it can cause corrosion of pipes and engines. In this study, methane oxidation was used to eliminate oxygen from LFG and perovskite-type ceramic catalysts of La-Sr-Co-Fe-O composition was selected as a catalyst. Hollow fiber catalysts (HFC, Hollow Fiber Catalysts) have attracted attention as a new concept alternative because they have high specific surface area and mechanical strength compared to other types of catalysts. HFC was prepared by a phase-inversion/sintering technique using commercial La-Sr-Co-Fe-O powder. In order to measure the catalysts' activity, simulated LFG was used for feed gas and complete oxidation reaction of methane was confirmed. Pore structure of the HFC was confirmed by SEM image and perovskite structure of single phase was analyzed by XRD. In addition, TPR analysis was performed to verify the oxygen adsorption mechanism of the HFC. Acknowledgement—The project is supported by the ‘Global Top Environment R&D Program’ in the ‘R&D Center for reduction of Non-CO₂ Greenhouse gases’ (Development and demonstration of oxygen removal technology of landfill gas) funded by Korea Ministry of Environment (ME). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=complete%20oxidation" title="complete oxidation">complete oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=greenhouse%20gas" title=" greenhouse gas"> greenhouse gas</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20fiber%20catalyst" title=" hollow fiber catalyst"> hollow fiber catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=land%20fill%20gas" title=" land fill gas"> land fill gas</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20removal" title=" oxygen removal"> oxygen removal</a>, <a href="https://publications.waset.org/abstracts/search?q=perovskite%20catalyst" title=" perovskite catalyst"> perovskite catalyst</a> </p> <a href="https://publications.waset.org/abstracts/80444/fabrication-and-characterization-analysis-of-la-sr-co-fe-o-perovskite-hollow-fiber-catalyst-for-oxygen-removal-in-landfill-gas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80444.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">117</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">2812</span> Development of Ceramic Spheres Buoyancy Modules for Deep-Sea Oil Exploration </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Blugan">G. Blugan</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Jiang"> B. Jiang</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Thornberry"> J. Thornberry</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Sturzenegger"> P. Sturzenegger</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Gonzenbach"> U. Gonzenbach</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Misson"> M. Misson</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Cartlidge"> D. Cartlidge</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Stenerud"> R. Stenerud</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Kuebler"> J. Kuebler</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Low-cost ceramic spheres were developed and manufactured from the engineering ceramic aluminium oxide. Hollow spheres of 50 mm diameter with a wall thickness of 0.5-1.0 mm were produced via an adapted slip casting technique. It was possible to produce the spheres with good repeatability and with no defects or failures in the spheres due to the manufacturing process. The spheres were developed specifically for use in buoyancy devices for deep-sea exploration conditions at depths of 3000 m below sea level. The spheres with a 1.0 mm wall thickness exhibit a buoyancy of over 54% while the spheres with a 0.5 mm wall thickness exhibit a buoyancy of over 73%. The mechanical performance of the spheres was confirmed by performing a hydraulic burst pressure test on individual spheres. With a safety factor of 3, all spheres with 1.0 mm wall thickness survived a hydraulic pressure of greater than 150 MPa which is equivalent to a depth of more than 5000 m below sea level. The spheres were then incorporated into a buoyancy module. These hollow aluminium oxide ceramic spheres offer an excellent possibility of deep-sea exploration to depths greater than the currently used technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=buoyancy" title="buoyancy">buoyancy</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20spheres" title=" ceramic spheres"> ceramic spheres</a>, <a href="https://publications.waset.org/abstracts/search?q=deep-sea" title=" deep-sea"> deep-sea</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20exploration" title=" oil exploration"> oil exploration</a> </p> <a href="https://publications.waset.org/abstracts/51232/development-of-ceramic-spheres-buoyancy-modules-for-deep-sea-oil-exploration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51232.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">414</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">2811</span> Physicochemical Characterization of MFI–Ceramic Hollow Fibres Membranes for CO2 Separation with Alkali Metal Cation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Alshebani">A. Alshebani</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Swesi"> Y. Swesi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Mrayed"> S. Mrayed</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Altaher"> F. Altaher</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper present some preliminary work on the preparation and physicochemical caracterization of nanocomposite MFI-alumina structures based on alumina hollow fibres. The fibers are manufactured by a wet spinning process. α-alumina particles were dispersed in a solution of polysulfone in NMP. The resulting slurry is pressed through the annular gap of a spinneret into a precipitation bath. The resulting green fibres are sintered. The mechanical strength of the alumina hollow fibres is determined by a three-point-bending test while the pore size is characterized by bubble-point testing. The bending strength is in the range of 110 MPa while the average pore size is 450 nm for an internal diameter of 1 mm and external diameter of 1.7 mm. To characterize the MFI membranes various techniques were used for physicochemical characterization of MFI–ceramic hollow fibres membranes: The nitrogen adsorption, X-ray diffractometry, scanning electron microscopy combined with X emission microanalysis. Scanning Electron Microscopy (SEM) and Energy Dispersive Microanalysis by the X-ray were used to observe the morphology of the hollow fibre membranes (thickness, infiltration into the carrier, defects, homogeneity). No surface film, has been obtained, as observed by SEM and EDX analysis and confirmed by high temperature variation of N2 and CO2 gas permeances before cation exchange. Local analysis and characterise (SEM and EDX) and overall (by ICP elemental analysis) were conducted on two samples exchanged to determine the quantity and distribution of the cation of cesium on the cross section fibre of the zeolite between the cavities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=physicochemical%20characterization%20of%20MFI" title="physicochemical characterization of MFI">physicochemical characterization of MFI</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fibre" title=" ceramic hollow fibre"> ceramic hollow fibre</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2" title=" CO2"> CO2</a>, <a href="https://publications.waset.org/abstracts/search?q=ion-exchange" title=" ion-exchange"> ion-exchange</a> </p> <a href="https://publications.waset.org/abstracts/13679/physicochemical-characterization-of-mfi-ceramic-hollow-fibres-membranes-for-co2-separation-with-alkali-metal-cation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13679.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">351</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">2810</span> Ultrathin Tin-Silicalite 1 Zeolite Membrane in Ester Solvent Recovery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kun%20Liang%20Ang">Kun Liang Ang</a>, <a href="https://publications.waset.org/abstracts/search?q=Eng%20Toon%20Saw"> Eng Toon Saw</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20He"> Wei He</a>, <a href="https://publications.waset.org/abstracts/search?q=Xuecheng%20Dong"> Xuecheng Dong</a>, <a href="https://publications.waset.org/abstracts/search?q=Seeram%20%20Ramakrishna"> Seeram Ramakrishna</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ester solvents are widely used in pharmaceutical, printing and flavor industry due to their good miscibility, low toxicity, and high volatility. Through pervaporation, these ester solvents can be recovered from industrial wastewater. While metal-doped silicalite 1 zeolite membranes are commonly used in organic solvent recovery in the pervaporation process, these ceramic membranes suffer from low membrane permeation flux, mainly due to the high thickness of the metal-doped zeolite membrane. Herein, a simple method of fabricating an ultrathin tin-silicalite 1 membrane supported on alumina tube is reported. This ultrathin membrane is able to achieve high permeation flux and separation factor for an ester in a diluted aqueous solution. Nanosized tin-Silicalite 1 seeds which are smaller than 500nm has been formed through hydrothermal synthesis. The sn-Silicalite 1 seeds were then seeded onto alumina tube through dip coating, and the tin-Silicalite 1 membrane was then formed by hydrothermal synthesis in an autoclave through secondary growth method. Multiple membrane synthesis factors such as seed size, ceramic substrate surface pore size selection, and secondary growth conditions were studied for their effects on zeolite membrane growth. The microstructure, morphology and the membrane thickness of tin-Silicalite 1 zeolite membrane were examined. The membrane separation performance and stability will also be reported. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title="ceramic membrane">ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=pervaporation" title=" pervaporation"> pervaporation</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent%20recovery" title=" solvent recovery"> solvent recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=Sn-MFI%20zeolite" title=" Sn-MFI zeolite"> Sn-MFI zeolite</a> </p> <a href="https://publications.waset.org/abstracts/97044/ultrathin-tin-silicalite-1-zeolite-membrane-in-ester-solvent-recovery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97044.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">189</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">2809</span> Hybrid Method Development for the Removal of Crystal Violet Dye from Aqueous Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20Nareshyadav">D. Nareshyadav</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Anand%20Kishore"> K. Anand Kishore</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Bhagawan"> D. Bhagawan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water scarcity is the much-identified issue all over the world. The available sources of water need to be reused to sustainable future. The present work explores the treatment of dye wastewater using combinative photocatalysis and ceramic nanofiltration membrane. Commercial ceramic membrane and TiO₂ catalyst were used in this study to investigate the removal of crystal violet dye from the aqueous solution. The effect of operating parameters such as inlet pressure, initial concentration of crystal violet dye, catalyst (TiO₂) loading, initial pH was investigated in the individual system as well as the combined system. In this study, 95 % of dye water was decolorized and 89 % of total organic carbon (TOC) was removed by the hybrid system for 500 ppm of dye and 0.75 g/l of TiO₂ concentrations at pH 9. The operation of the integrated photocatalytic reactor and ceramic membrane ﬁltration has shown the maximum removal of crystal violet dye compared to individual systems. Hence this proposed method may be effective for the removal of Crystal violet dye from effluents. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=advanced%20oxidation%20process" title="advanced oxidation process">advanced oxidation process</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20nanoporous%20membrane" title=" ceramic nanoporous membrane"> ceramic nanoporous membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=dye%20degradation%2Fremoval" title=" dye degradation/removal"> dye degradation/removal</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20system" title=" hybrid system"> hybrid system</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalysis" title=" photocatalysis"> photocatalysis</a> </p> <a href="https://publications.waset.org/abstracts/97034/hybrid-method-development-for-the-removal-of-crystal-violet-dye-from-aqueous-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97034.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">177</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">2808</span> Coal Fly Ash Based Ceramic Membrane for Water Purification via Ultrafiltration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Obsi%20Terfasa">Obsi Terfasa</a>, <a href="https://publications.waset.org/abstracts/search?q=Bhanupriya%20Das"> Bhanupriya Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Shiao-Shing%20Chen"> Shiao-Shing Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Converting coal fly ash (CFA) waste into ceramic membranes presents a promising alternative to traditional disposal methods, offering potential economic and environmental advantages that warrant further investigation. This research focuses on the creation of ceramic membranes exclusively from CFA using a uniaxial compaction technique. The membranes' properties were examined through various analytical methods: Scanning Electron Microscopy (SEM) revealed a porous and flawless membrane surface, X-Ray Diffraction (XRD) identified mullite and quartz crystalline structures, and Fourier-Transform Infrared Spectroscopy (FTIR) characterized the membrane's functional groups. Thermogravimetric analysis (TGA) determined the ideal sintering temperature to be 800°C. To evaluate its separation capabilities, the synthesized membrane was tested on wastewater from denim jeans production at 0.2 bar pressure. The results were impressive, with 97.42% removal of Chemical Oxygen Demand (COD), 95% color elimination, and a pure water flux of 4.5 Lm⁻²h⁻¹bar⁻¹. These findings suggest that CFA, a byproduct of thermal power plants, can be effectively repurposed to produce ultrafiltration membranes suitable for various industrial purification and separations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wastewater%20treatment" title="wastewater treatment">wastewater treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=separator" title=" separator"> separator</a>, <a href="https://publications.waset.org/abstracts/search?q=coal%20fly%20ash" title=" coal fly ash"> coal fly ash</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title=" ceramic membrane"> ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrafiltration" title=" ultrafiltration"> ultrafiltration</a> </p> <a href="https://publications.waset.org/abstracts/190216/coal-fly-ash-based-ceramic-membrane-for-water-purification-via-ultrafiltration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/190216.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">36</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">2807</span> Effect of Hollow and Solid Recycled-Poly Fibers on the Mechanical and Morphological Properties of Short-Fiber-Reinforced Polypropylene Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Kerakra">S. Kerakra</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Bouhelal"> S. Bouhelal</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Poncot"> M. Poncot</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study is to give a comprehensive overview of the effect of short hollow and solid recycled polyethylene terephthalate (PET) fibers in different breaking tenacities reinforced isotactic polypropylene (iPP) composites on the mechanical and morphological properties. Composites of iPP/3, 7and 10 wt% of solid and hollow recycled PET fibers were prepared by batched melt mixing in a Brabender. The incorporation of solid recycled-PET fibers in isotactic polypropylene increase Young’s modulus of iPP relatively, meanwhile it increased proportionally with hollow fibers content. An improvement of the storage modulus, and a shift up in glass transition temperatures of hollow fibers/iPP composites was determined by DMA results. The morphology of composites was determined by scanning electron microscope (SEM) and optical polarized microscopy (OM) showing a good dispersion of the hollow fibers. Also, their flexible aspect (folding, bending) was observed. But, one weak interaction between the polymer/fibers phases was shown. Polymers can be effectively reinforced with short hollow recycled PET fibers due to their characteristics like recyclability, lightweight and the flexible aspect, which allows the absorbance of the energy of a striker with a minimum damage of the matrix. Aiming to improve the affinity matrix–recycled hollow PET fibers, it is suggested the addition of compatibilizers, as maleic anhydride. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=isotactic%20polypropylene" title="isotactic polypropylene">isotactic polypropylene</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20recycled%20PET%20fibers" title=" hollow recycled PET fibers"> hollow recycled PET fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=solid%20recycled-PET%20fibers" title=" solid recycled-PET fibers"> solid recycled-PET fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=composites" title=" composites"> composites</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20fiber" title=" short fiber"> short fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=scanning%20electron%20microscope" title=" scanning electron microscope"> scanning electron microscope</a> </p> <a href="https://publications.waset.org/abstracts/87527/effect-of-hollow-and-solid-recycled-poly-fibers-on-the-mechanical-and-morphological-properties-of-short-fiber-reinforced-polypropylene-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87527.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">276</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">2806</span> Removal of Bulk Parameters and Chromophoric Fractions of Natural Organic Matter by Porous Kaolin/Fly Ash Ceramic Membrane at South African Drinking Water Treatment Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samkeliso%20S.%20Ndzimandze">Samkeliso S. Ndzimandze</a>, <a href="https://publications.waset.org/abstracts/search?q=Welldone%20Moyo"> Welldone Moyo</a>, <a href="https://publications.waset.org/abstracts/search?q=Oranso%20T.%20Mahlangu"> Oranso T. Mahlangu</a>, <a href="https://publications.waset.org/abstracts/search?q=Adolph%20A.%20Muleja"> Adolph A. Muleja</a>, <a href="https://publications.waset.org/abstracts/search?q=Alex%20T.%20Kuvarega"> Alex T. Kuvarega</a>, <a href="https://publications.waset.org/abstracts/search?q=Thabo%20T.%20I.%20Nkambule"> Thabo T. I. Nkambule</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The high cost of precursor materials has hindered the commercialization of ceramic membrane technology in water treatment. In this work, a ceramic membrane disc (approximately 50 mm in diameter and 4 mm thick) was prepared from low-cost starting materials, kaolin, and fly ash by pressing at 200 bar and calcining at 900 °C. The fabricated membrane was characterized for various physicochemical properties, natural organic matter (NOM) removal as well as fouling propensity using several techniques. Further, the ceramic membrane was tested on samples collected from four drinking water treatment plants in KwaZulu-Natal, South Africa (named plants 1-4). The membrane achieved 48.6%, 54.6%, 57.4%, and 76.4% bulk UV254 reduction for raw water at plants 1, 2, 3, and 4, respectively. These removal rates were comparable to UV254 reduction achieved by coagulation/flocculation steps at the respective plants. Further, the membrane outperformed sand filtration steps in plants 1-4 in removing disinfection by-product precursors (8%-32%) through size exclusion. Fluorescence excitation-emission matrices (FEEM) studies showed the removal of fluorescent NOM fractions present in the water samples by the membrane. The membrane was fabricated using an up-scalable facile method, and it has the potential for application as a polishing step to complement conventional processes in water treatment for drinking purposes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crossflow%20filtration" title="crossflow filtration">crossflow filtration</a>, <a href="https://publications.waset.org/abstracts/search?q=drinking%20water%20treatment%20plants" title=" drinking water treatment plants"> drinking water treatment plants</a>, <a href="https://publications.waset.org/abstracts/search?q=fluorescence%20excitation-emission%20matrices" title=" fluorescence excitation-emission matrices"> fluorescence excitation-emission matrices</a>, <a href="https://publications.waset.org/abstracts/search?q=ultraviolet%20254%20%28UV%E2%82%82%E2%82%85%E2%82%84%29" title=" ultraviolet 254 (UV₂₅₄)"> ultraviolet 254 (UV₂₅₄)</a> </p> <a href="https://publications.waset.org/abstracts/185367/removal-of-bulk-parameters-and-chromophoric-fractions-of-natural-organic-matter-by-porous-kaolinfly-ash-ceramic-membrane-at-south-african-drinking-water-treatment-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185367.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">43</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">2805</span> Shear Behavior of Steel-Fiber-Reinforced Precast/Prestressed Concrete Hollow Core Slabs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thi%20Nguyet%20Hang%20Nguyen">Thi Nguyet Hang Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Kang%20Hai%20Tan"> Kang Hai Tan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Precast/prestressed concrete hollow core (PCHC) slabs, especially ones with depth more than 300 mm, are susceptible to web-shear failure. The reasons lie on the fact that the production process of PCHC slabs, i.e., the extrusion method (the most common method to cast PCHC slabs nowadays), does not allow them to contain any shear reinforcement. Moreover, due to the presence of the longitudinal voids, cross sections of PCHC slabs are reduced. Therefore, the shear capacity of the slabs depends solely on the tensile strength of concrete which is relatively low. Given that shear is a major concern in using hollow-core slabs, this paper investigates the possibility of adopting steel fibers in PCHC slabs produced by the extrusion method to enhance the shear capacity of the slabs. Three full-scale PCHC slabs with and without hooked-steel fibers were cast and tested until failure. Three different volumetric fiber contents of 0, 0.51 and 0.89% were investigated. The test results showed that there were substantial increases in shear capacity and ductility with the use of hooked-steel fibers. Ultimate shear strength increased with fiber content. In addition, while the specimen without steel fibers and the one with the steel-fiber volume fraction of 0.51% failed in web-shear mode, the specimen with the higher fiber content (0.89%) collapsed in flexural-shear mode. However, as the hooked-steel fibers with the fiber content of 0.89% were used, difficulties in concrete consolidation were observed while concrete was being cast. This could lead to a lower ultimate shear capacity due to a poorer bond between the concrete and the steel fibers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hollow-core%20slabs" title="hollow-core slabs">hollow-core slabs</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20strength" title=" shear strength"> shear strength</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20fibers" title=" steel fibers"> steel fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=web-shear%20failure" title=" web-shear failure"> web-shear failure</a> </p> <a href="https://publications.waset.org/abstracts/108492/shear-behavior-of-steel-fiber-reinforced-precastprestressed-concrete-hollow-core-slabs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108492.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">171</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">2804</span> Advanced Exergetic Analysis: Decomposition Method Applied to a Membrane-Based Hard Coal Oxyfuel Power Plant</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Renzo%20Castillo">Renzo Castillo</a>, <a href="https://publications.waset.org/abstracts/search?q=George%20Tsatsaronis"> George Tsatsaronis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> High-temperature ceramic membranes for air separation represents an important option to reduce the significant efficiency drops incurred in state-of-the-art cryogenic air separation for high tonnage oxygen production required in oxyfuel power stations. This study is focused on the thermodynamic analysis of two power plant model designs: the state-of-the-art supercritical 600ᵒC hard coal plant (reference power plant Nordrhein-Westfalen) and the membrane-based oxyfuel concept implemented in this reference plant. In the latter case, the oxygen is separated through a mixed-conducting hollow fiber perovskite membrane unit in the three-end operation mode, which has been simulated under vacuum conditions on the permeate side and at high-pressure conditions on the feed side. The thermodynamic performance of each plant concept is assessed by conventional exergetic analysis, which determines location, magnitude and sources of efficiency losses, and advanced exergetic analysis, where endogenous/exogenous and avoidable/unavoidable parts of exergy destruction are calculated at the component and full process level. These calculations identify thermodynamic interdependencies among components and reveal the real potential for efficiency improvements. The endogenous and exogenous exergy destruction portions are calculated by the decomposition method, a recently developed straightforward methodology, which is suitable for complex power stations with a large number of process components. Lastly, an improvement priority ranking for relevant components, as well as suggested changes in process layouts are presented for both power stations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=exergy" title="exergy">exergy</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20capture%20and%20storage" title=" carbon capture and storage"> carbon capture and storage</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membranes" title=" ceramic membranes"> ceramic membranes</a>, <a href="https://publications.waset.org/abstracts/search?q=perovskite" title=" perovskite"> perovskite</a>, <a href="https://publications.waset.org/abstracts/search?q=oxyfuel%20combustion" title=" oxyfuel combustion"> oxyfuel combustion</a> </p> <a href="https://publications.waset.org/abstracts/78550/advanced-exergetic-analysis-decomposition-method-applied-to-a-membrane-based-hard-coal-oxyfuel-power-plant" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78550.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">185</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">2803</span> Green and Facile Fabrication and Characterization of Fe/ZnO Hollow Spheres and Photodegradation of Azo Dyes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyed%20Mohsen%20Mousavi">Seyed Mohsen Mousavi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Reza%20Mahjoub"> Ali Reza Mahjoub</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahjat%20Afshari%20Razani"> Bahjat Afshari Razani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, Fe/ZnO hollow spherical structures with high surface area using the template glucose was prepared by the hydrothermal method using an ultrasonic bath at room temperature was produced and were identified by FT-IR, XRD, FE-SEM and BET. The photocatalytic activity of synthesized spherical Fe/ZnO hollow sphere were studied in the destruction of Congo Red and Methylene Blue as Azo dyes. The results showed that the photocatalytic activity of Fe/ZnO hollow spherical structures is improved compared with ZnO hollow sphere and other morphologys. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=azo%20dyes" title="azo dyes">azo dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Fe%2FZnO%20hollow%20sphere" title=" Fe/ZnO hollow sphere"> Fe/ZnO hollow sphere</a>, <a href="https://publications.waset.org/abstracts/search?q=hollow%20sphere%20nanostructures" title=" hollow sphere nanostructures"> hollow sphere nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalyst" title=" photocatalyst"> photocatalyst</a> </p> <a href="https://publications.waset.org/abstracts/56367/green-and-facile-fabrication-and-characterization-of-fezno-hollow-spheres-and-photodegradation-of-azo-dyes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56367.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">370</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">2802</span> Layer-by-Layer Modified Ceramic Membranes for Micropollutant Removal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jenny%20Radeva">Jenny Radeva</a>, <a href="https://publications.waset.org/abstracts/search?q=Anke-Gundula%20Roth"> Anke-Gundula Roth</a>, <a href="https://publications.waset.org/abstracts/search?q=Christian%20Goebbert"> Christian Goebbert</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20Niestroj-Pahl"> Robert Niestroj-Pahl</a>, <a href="https://publications.waset.org/abstracts/search?q=Lars%20Daehne"> Lars Daehne</a>, <a href="https://publications.waset.org/abstracts/search?q=Axel%20Wolfram"> Axel Wolfram</a>, <a href="https://publications.waset.org/abstracts/search?q=Juergen%20Wiese"> Juergen Wiese</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ceramic membranes for water purification combine excellent stability with long-life characteristics and high chemical resistance. Layer-by-Layer coating is a well-known technique for customization and optimization of filtration properties of membranes but is mostly used on polymeric membranes. Ceramic membranes comprising a metal oxide filtration layer of Al2O3 or TiO2 are charged and therefore highly suitable for polyelectrolyte adsorption. The high stability of the membrane support allows efficient backwash and chemical cleaning of the membrane. The presented study reports metal oxide/organic composite membrane with an increased rejection of bivalent salts like MgSO4 and the organic micropollutant Diclofenac. A self-build apparatus was used for applying the polyelectrolyte multilayers on the ceramic membrane. The device controls the flow and timing of the polyelectrolytes and washing solutions. As support for the Layer-by-Layer coat, ceramic mono-channel membranes were used with an inner capillary of 8 mm diameter, which is connected to the coating device. The inner wall of the capillary is coated subsequently with polycat- and anions. The filtration experiments were performed with a feed solution of MgSO4 and Diclofenac. The salt content of the permeate was detected conductometrically and Diclofenac was measured with UV-Adsorption. The concluded results show retention values of magnesium sulfate of 70% and diclofenac retention of 60%. Further experimental research studied various parameters of the composite membrane-like Molecular Weight Cut Off and pore size, Zeta potential and its mechanical and chemical robustness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=water%20purification" title="water purification">water purification</a>, <a href="https://publications.waset.org/abstracts/search?q=polyelectrolytes" title=" polyelectrolytes"> polyelectrolytes</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20modification" title=" membrane modification"> membrane modification</a>, <a href="https://publications.waset.org/abstracts/search?q=layer-by-layer%20coating" title=" layer-by-layer coating"> layer-by-layer coating</a>, <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membranes" title=" ceramic membranes"> ceramic membranes</a> </p> <a href="https://publications.waset.org/abstracts/138651/layer-by-layer-modified-ceramic-membranes-for-micropollutant-removal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138651.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">245</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">2801</span> Micro-Filtration with an Inorganic Membrane</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benyamina">Benyamina</a>, <a href="https://publications.waset.org/abstracts/search?q=Ouldabess"> Ouldabess</a>, <a href="https://publications.waset.org/abstracts/search?q=Bensalah"> Bensalah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study is to use membrane technique for filtration of a coloring solution. the preparation of the micro-filtration membranes is based on a natural clay powder with a low cost, deposited on macro-porous ceramic supports. The micro-filtration membrane provided a very large permeation flow. Indeed, the filtration effectiveness of membrane was proved by the total discoloration of bromothymol blue solution with initial concentration of 10-3 mg/L after the first minutes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=the%20inorganic%20membrane" title="the inorganic membrane">the inorganic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-filtration" title=" micro-filtration"> micro-filtration</a>, <a href="https://publications.waset.org/abstracts/search?q=coloring%20solution" title=" coloring solution"> coloring solution</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20clay%20powder" title=" natural clay powder"> natural clay powder</a> </p> <a href="https://publications.waset.org/abstracts/25743/micro-filtration-with-an-inorganic-membrane" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25743.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">513</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">2800</span> Performance Evaluation of an Inventive Co2 Gas Separation Inorganic Ceramic Membrane System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ngozi%20Claribelle%20Nwogu">Ngozi Claribelle Nwogu</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Nasir%20Kajama"> Mohammed Nasir Kajama</a>, <a href="https://publications.waset.org/abstracts/search?q=Oyoh%20Kechinyere"> Oyoh Kechinyere</a>, <a href="https://publications.waset.org/abstracts/search?q=Edward%20Gobina"> Edward Gobina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Atmospheric carbon dioxide emissions are considered as the greatest environmental challenge the world is facing today. The challenges to control the emissions include the recovery of CO2 from flue gas. This concern has been improved due to recent advances in materials process engineering resulting in the development of inorganic gas separation membranes with excellent thermal and mechanical stability required for most gas separations. This paper therefore evaluates the performance of a highly selective inorganic membrane for CO2 recovery applications. Analysis of results obtained is in agreement with experimental literature data. Further results show the prediction performance of the membranes for gas separation and the future direction of research. The materials selection and the membrane preparation techniques are discussed. Method of improving the interface defects in the membrane and its effect on the separation performance has also been reviewed and in addition advances to totally exploit the potential usage of this innovative membrane. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20dioxide" title="carbon dioxide">carbon dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20separation" title=" gas separation"> gas separation</a>, <a href="https://publications.waset.org/abstracts/search?q=inorganic%20ceramic%20membrane" title=" inorganic ceramic membrane"> inorganic ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=permselectivity" title=" permselectivity"> permselectivity</a> </p> <a href="https://publications.waset.org/abstracts/25961/performance-evaluation-of-an-inventive-co2-gas-separation-inorganic-ceramic-membrane-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25961.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">344</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">2799</span> Microfiltration of the Sugar Refinery Wastewater Using Ceramic Membrane with Kenics Static Mixer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zita%20%C5%A0ere%C5%A1">Zita Šereš</a>, <a href="https://publications.waset.org/abstracts/search?q=Ljubica%20Doki%C4%87"> Ljubica Dokić</a>, <a href="https://publications.waset.org/abstracts/search?q=Nikola%20Maravi%C4%87"> Nikola Maravić</a>, <a href="https://publications.waset.org/abstracts/search?q=Dragana%20%20%C5%A0oronja%20Simovi%C4%87"> Dragana Šoronja Simović</a>, <a href="https://publications.waset.org/abstracts/search?q=Cecilia%20Hodur"> Cecilia Hodur</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivana%20Nikoli%C4%87"> Ivana Nikolić</a>, <a href="https://publications.waset.org/abstracts/search?q=Biljana%20Pajin"> Biljana Pajin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New environmental regulations and the increasing market preference for companies that respect the ecosystem had encouraged the industry to look after new treatments for its effluents. The sugar industry, one of the largest emitter of environmental pollutants, follows this tendency. Membrane technology is convenient for separation of suspended solids, colloids and high molecular weight materials that are present in a wastewater from the sugar industry. The idea is to microfilter the wastewater, where the permeate passes through the membrane and becomes available for recycle and re-use in the sugar manufacturing process. For microfiltration of this effluent a tubular ceramic membrane was used with a pore size of 200 nm at transmembrane pressure in range of 1 – 3 bars and in range of flow rate of 50 – 150 l/h. Kenics static mixer was used for permeate flux enhancement. Turbidity and suspended solids were removed and the permeate flux was continuously monitored during the microfiltration process. The flux achieved after 90 minutes of microfiltration was in a range of 50-70 L/m2h. The obtained turbidity decrease was in the range of 50-99% and the total amount of suspended solids was removed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramic%20membrane" title="ceramic membrane">ceramic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=microfiltration" title=" microfiltration"> microfiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=permeate%20flux" title=" permeate flux"> permeate flux</a>, <a href="https://publications.waset.org/abstracts/search?q=sugar%20industry" title=" sugar industry"> sugar industry</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a> </p> <a href="https://publications.waset.org/abstracts/28798/microfiltration-of-the-sugar-refinery-wastewater-using-ceramic-membrane-with-kenics-static-mixer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28798.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">523</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=ceramic%20hollow%20fiber%20membrane&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fiber%20membrane&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ceramic%20hollow%20fiber%20membrane&page=4">4</a></li> <li class="page-item"><a class="page-link" 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