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catalyst</title> <meta name="description" content="Search results for: Pt-Sn alloy catalyst"> <meta name="keywords" content="Pt-Sn alloy catalyst"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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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="Pt-Sn alloy catalyst"> <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> 1508</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Pt-Sn alloy catalyst</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1508</span> Oxidation Activity of Platinum-Ruthenium-Tin Ternary Alloy Catalyst on Bio-Alcohol</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=An-Ya%20Lo">An-Ya Lo</a>, <a href="https://publications.waset.org/abstracts/search?q=Yi-Chen%20Chung"> Yi-Chen Chung</a>, <a href="https://publications.waset.org/abstracts/search?q=Yun-Chi%20Hsu"> Yun-Chi Hsu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chuan-Ming%20Tseng"> Chuan-Ming Tseng</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiu-Yue%20Lin"> Chiu-Yue Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the ternary alloy catalyst Pt20RuxSny (where 20, x, y represent mass fractions of Pt, Ru, and Sn, respectively) was optimized for the preliminary study of bio-ethanol fuel cells (BAFC). The morphology, microstructure, composition, phase-structures, and electrochemical properties of Pt20RuxSny catalyst were examined by SEM, TEM, EDS-mapping, XRD, and potentiostat. The effect of Sn content on electrochemical active surface (EAS) and oxidation activity were discussed. As a result, the additional Sn greatly improves the efficiency of Pt20RuxSny, either x=0 or 10. Through discussing the difference between ethanol and glycol oxidations, the mechanism of tolerance against poisoning has been proved. Overall speaking, the catalytic activity are in the order of Pt20RuxSny > Pt20Rux > Pt20Sny in both ethanol and glycol systems. Finally, Pt20Ru10Sn15 catalyst was successfully applied to demonstrate the feasibility of using bio-alcohol. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst" title="Pt-Sn alloy catalyst">Pt-Sn alloy catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=Pt-Ru-Sn%20alloy%20catalyst" title=" Pt-Ru-Sn alloy catalyst"> Pt-Ru-Sn alloy catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20cell" title=" fuel cell"> fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=ethanol" title=" ethanol"> ethanol</a>, <a href="https://publications.waset.org/abstracts/search?q=ethylene%20glycol" title=" ethylene glycol"> ethylene glycol</a> </p> <a href="https://publications.waset.org/abstracts/54818/oxidation-activity-of-platinum-ruthenium-tin-ternary-alloy-catalyst-on-bio-alcohol" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54818.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">417</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">1507</span> The Performance of PtSn/Al₂O₃ with Cylindrical Particles for Acetic Acid Hydrogenation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mingchuan%20Zhou">Mingchuan Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Haitao%20Zhang"> Haitao Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hongfang%20Ma"> Hongfang Ma</a>, <a href="https://publications.waset.org/abstracts/search?q=Weiyong%20Ying"> Weiyong Ying</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Alumina supported PtSn catalysts with cylindrical particles were prepared and characterized by using low temperature N2 adsorption/desorption and X-ray diffraction. Low temperature N2 adsorption/desorption demonstrate that the tableting changed the texture properties of catalysts. XRD pattern indicate that the crystal structure of supports had no change after reaction. The performances over particles of PtSn/Al2O3 catalysts were investigated with regards to reaction temperature, pressure, and H2/AcOH mole ratio. After tableting, the conversion of acetic acid and selectivity of ethanol and acetyl acetate decreased. High reaction temperature and pressure can improve conversion of acetic acid. H2/AcOH mole ratio of 9.36 showed the best performance on acetic acid hydrogenation. High pressure had benefits for the selectivity of ethanol and other two parameters had no obvious effect on selectivity.   <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acetic%20acid%20hydrogenation" title="acetic acid hydrogenation">acetic acid hydrogenation</a>, <a href="https://publications.waset.org/abstracts/search?q=cylindrical%20particles" title=" cylindrical particles"> cylindrical particles</a>, <a href="https://publications.waset.org/abstracts/search?q=ethanol" title=" ethanol"> ethanol</a>, <a href="https://publications.waset.org/abstracts/search?q=PtSn" title=" PtSn"> PtSn</a> </p> <a href="https://publications.waset.org/abstracts/49368/the-performance-of-ptsnal2o3-with-cylindrical-particles-for-acetic-acid-hydrogenation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49368.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">319</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">1506</span> The Catalytic Properties of PtSn/Al2O3 for Acetic Acid Hydrogenation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mingchuan%20Zhou">Mingchuan Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=Haitao%20Zhang"> Haitao Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Hongfang%20Ma"> Hongfang Ma</a>, <a href="https://publications.waset.org/abstracts/search?q=Weiyong%20Ying"> Weiyong Ying</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Alumina supported platinum and tin catalysts with different loadings of Pt and Sn were prepared and characterized by low temperature N<sub>2</sub> adsorption/desorption, H<sub>2</sub>-temperature programed reduction and CO pulse chemisorption. Pt and Sn below 1% loading were suitable for acetic acid hydrogenation. The best performance over 0.75Pt1Sn/Al<sub>2</sub>O<sub>3</sub> can reach 87.55% conversion of acetic acid and 47.39% selectivity of ethanol. The operating conditions of acetic acid hydrogenation over 1Pt1Sn/Al<sub>2</sub>O<sub>3</sub> were investigated. High reaction temperature can enhance the conversion of acetic acid, but it decreased total selectivity of ethanol and acetyl acetate. High pressure and low weight hourly space velocity were beneficial to both conversion of acetic acid and selectivity to ethanol. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acetic%20acid" title="acetic acid">acetic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogenation" title=" hydrogenation"> hydrogenation</a>, <a href="https://publications.waset.org/abstracts/search?q=operating%20condition" title=" operating condition"> operating condition</a>, <a href="https://publications.waset.org/abstracts/search?q=PtSn" title=" PtSn"> PtSn</a> </p> <a href="https://publications.waset.org/abstracts/46773/the-catalytic-properties-of-ptsnal2o3-for-acetic-acid-hydrogenation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46773.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">355</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">1505</span> Controlled Synthesis of Pt₃Sn-SnOx/C Electrocatalysts for Polymer Electrolyte Membrane Fuel Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dorottya%20Guban">Dorottya Guban</a>, <a href="https://publications.waset.org/abstracts/search?q=Irina%20Borbath"> Irina Borbath</a>, <a href="https://publications.waset.org/abstracts/search?q=Istvan%20Bakos"> Istvan Bakos</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20Nemeth"> Peter Nemeth</a>, <a href="https://publications.waset.org/abstracts/search?q=Andras%20Tompos"> Andras Tompos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the greatest challenges of the implementation of polymer electrolyte membrane fuel cells (PEMFCs) is to find active and durable electrocatalysts. The cell performance is always limited by the oxygen reduction reaction (ORR) on the cathode since it is at least 6 orders of magnitude slower than the hydrogen oxidation on the anode. Therefore high loading of Pt is required. Catalyst corrosion is also more significant on the cathode, especially in case of mobile applications, where rapid changes of loading have to be tolerated. Pt-Sn bulk alloys and SnO2-decorated Pt3Sn nanostructures are among the most studied bimetallic systems for fuel cell applications. Exclusive formation of supported Sn-Pt alloy phases with different Pt/Sn ratios can be achieved by using controlled surface reactions (CSRs) between hydrogen adsorbed on Pt sites and tetraethyl tin. In this contribution our results for commercial and a home-made 20 wt.% Pt/C catalysts modified by tin anchoring via CSRs are presented. The parent Pt/C catalysts were synthesized by modified NaBH4-assisted ethylene-glycol reduction method using ethanol as a solvent, which resulted either in dispersed and highly stable Pt nanoparticles or evenly distributed raspberry-like agglomerates according to the chosen synthesis parameters. The 20 wt.% Pt/C catalysts prepared that way showed improved electrocatalytic performance in the ORR and stability in comparison to the commercial 20 wt.% Pt/C catalysts. Then, in order to obtain Sn-Pt/C catalysts with Pt/Sn= 3 ratio, the Pt/C catalysts were modified with tetraethyl tin (SnEt4) using three and five consecutive tin anchoring periods. According to in situ XPS studies in case of catalysts with highly dispersed Pt nanoparticles, pre-treatment in hydrogen even at 170°C resulted in complete reduction of the ionic tin to Sn0. No evidence of the presence of SnO2 phase was found by means of the XRD and EDS analysis. These results demonstrate that the method of CSRs is a powerful tool to create Pt-Sn bimetallic nanoparticles exclusively, without tin deposition onto the carbon support. On the contrary, the XPS results revealed that the tin-modified catalysts with raspberry-like Pt agglomerates always contained a fraction of non-reducible tin oxide. At the same time, they showed increased activity and long-term stability in the ORR than Pt/C, which was assigned to the presence of SnO2 in close proximity/contact with Pt-Sn alloy phase. It has been demonstrated that the content and dispersion of the fcc Pt3Sn phase within the electrocatalysts can be controlled by tuning the reaction conditions of CSRs. The bimetallic catalysts displayed an outstanding performance in the ORR. The preparation of a highly dispersed 20Pt/C catalyst permits to decrease the Pt content without relevant decline in the electrocatalytic performance of the catalysts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anode%20catalyst" title="anode catalyst">anode catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=cathode%20catalyst" title=" cathode catalyst"> cathode catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=controlled%20surface%20reactions" title=" controlled surface reactions"> controlled surface reactions</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20reduction%20reaction" title=" oxygen reduction reaction"> oxygen reduction reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=PtSn%2FC%20electrocatalyst" title=" PtSn/C electrocatalyst"> PtSn/C electrocatalyst</a> </p> <a href="https://publications.waset.org/abstracts/60520/controlled-synthesis-of-pt3sn-snoxc-electrocatalysts-for-polymer-electrolyte-membrane-fuel-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60520.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">234</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">1504</span> Growth of SWNTs from Alloy Catalyst Nanoparticles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Forel">S. Forel</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Bouanis"> F. Bouanis</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Catala"> L. Catala</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Florea"> I. Florea</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Huc"> V. Huc</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Fossard"> F. Fossard</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Loiseau"> A. Loiseau</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Cojocaru"> C. Cojocaru</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Single wall carbon nanotubes are seen as excellent candidate for application on nanoelectronic devices because of their remarkable electronic and mechanical properties. These unique properties are highly dependent on their chiral structures and the diameter. Therefore, structure controlled growth of SWNTs, especially directly on final device’s substrate surface, are highly desired for the fabrication of SWNT-based electronics. In this work, we present a new approach to control the diameter of SWNTs and eventually their chirality. Because of their potential to control the SWNT’s chirality, bi-metalics nanoparticles are used to prepare alloy nanoclusters with specific structure. The catalyst nanoparticles are pre-formed following a previously described process. Briefly, the oxide surface is first covered with a SAM (self-assembled monolayer) of a pyridine-functionalized silane. Then, bi-metallic (Fe-Ru, Co-Ru and Ni-Ru) complexes are assembled by coordination bonds on the pre-formed organic SAM. The resultant alloy nanoclusters were then used to catalyze SWNTs growth on SiO2/Si substrates via CH4/H2 double hot-filament chemical vapor deposition (d-HFCVD). The microscopy and spectroscopy analysis demonstrate the high quality of SWNTs that were furthermore integrated into high-quality SWNT-FET. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanotube" title="nanotube">nanotube</a>, <a href="https://publications.waset.org/abstracts/search?q=CVD" title=" CVD"> CVD</a>, <a href="https://publications.waset.org/abstracts/search?q=device" title=" device"> device</a>, <a href="https://publications.waset.org/abstracts/search?q=transistor" title=" transistor"> transistor</a> </p> <a href="https://publications.waset.org/abstracts/23788/growth-of-swnts-from-alloy-catalyst-nanoparticles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23788.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">317</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">1503</span> Generation of Catalytic Films of Zeolite Y and ZSM-5 on FeCrAlloy Metal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rana%20Th.%20A.%20Al-Rubaye">Rana Th. A. Al-Rubaye</a>, <a href="https://publications.waset.org/abstracts/search?q=Arthur%20A.%20Garforth"> Arthur A. Garforth</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work details the generation of thin films of structured zeolite catalysts (ZSM–5 and Y) onto the surface of a metal substrate (FeCrAlloy) using in-situ hydrothermal synthesis. In addition, the zeolite Y is post-synthetically modified by acidified ammonium ion exchange to generate US-Y. Finally the catalytic activity of the structured ZSM-5 catalyst films (Si/Al = 11, thickness 146 µm) and structured US–Y catalyst film (Si/Al = 8, thickness 23µm) were compared with the pelleted powder form of ZSM–5 and USY catalysts of similar Si/Al ratios. The structured catalyst films have been characterised using a range of techniques, including X-ray diffraction (XRD), Electron microscopy (SEM), Energy Dispersive X–ray analysis (EDX) and Thermogravimetric Analysis (TGA). The transition from oxide-on-alloy wires to hydrothermally synthesised uniformly zeolite coated surfaces was followed using SEM and XRD. In addition, the robustness of the prepared coating was confirmed by subjecting these to thermal cycling (ambient to 550°C). The cracking of n–heptane over the pellets and structured catalysts for both ZSM–5 and Y zeolite showed very similar product selectivities for similar amounts of catalyst with an apparent activation energy of around 60 kJ mol-1. This paper demonstrates that structured catalysts can be manufactured with excellent zeolite adherence and when suitably activated/modified give comparable cracking results to the pelleted powder forms. These structured catalysts will improve temperature distribution in highly exothermic and endothermic catalysed processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FeCrAlloy" title="FeCrAlloy">FeCrAlloy</a>, <a href="https://publications.waset.org/abstracts/search?q=structured%20catalyst" title=" structured catalyst"> structured catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=zeolite%20Y" title=" zeolite Y"> zeolite Y</a>, <a href="https://publications.waset.org/abstracts/search?q=zeolite%20ZSM-5" title=" zeolite ZSM-5"> zeolite ZSM-5</a> </p> <a href="https://publications.waset.org/abstracts/11391/generation-of-catalytic-films-of-zeolite-y-and-zsm-5-on-fecralloy-metal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11391.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">380</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">1502</span> Effect of Aging Treatment on Tensile Properties of AZ91D Mg Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ju%20Hyun%20Won">Ju Hyun Won</a>, <a href="https://publications.waset.org/abstracts/search?q=Seok%20Hong%20Min"> Seok Hong Min</a>, <a href="https://publications.waset.org/abstracts/search?q=Tae%20Kwon%20Ha"> Tae Kwon Ha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phase equilibria of AZ91D Mg alloys for nonflammable use, containing Ca and Y, were carried out by using FactSage® and FTLite database, which revealed that solid solution treatment, could be performed at temperatures from 400 to 450 °C. Solid solution treatment of AZ91D Mg alloy without Ca and Y was successfully conducted at 420 °C and supersaturated microstructure with all beta phase resolved into matrix was obtained. In the case of AZ91D Mg alloy with some Ca and Y, however, a little amount of intermetallic particles were observed after solid solution treatment. After solid solution treatment, each alloy was annealed at temperatures of 180 and 200 °C for time intervals from 1 min to 48 hrs and hardness of each condition was measured by micro-Vickers method. Peak aging conditions were deduced as at the temperature of 200 °C for 10 hrs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mg%20alloy" title="Mg alloy">Mg alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=AZ91D" title=" AZ91D"> AZ91D</a>, <a href="https://publications.waset.org/abstracts/search?q=nonflammable%20alloy" title=" nonflammable alloy"> nonflammable alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20equilibrium" title=" phase equilibrium"> phase equilibrium</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20aging" title=" peak aging"> peak aging</a> </p> <a href="https://publications.waset.org/abstracts/34978/effect-of-aging-treatment-on-tensile-properties-of-az91d-mg-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34978.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">429</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">1501</span> Oxidation of Alcohols Types Using Nano-Graphene Oxide (NGO) as Heterogeneous Catalyst</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Gharib">Ali Gharib</a>, <a href="https://publications.waset.org/abstracts/search?q=Leila%20Vojdanifard"> Leila Vojdanifard</a>, <a href="https://publications.waset.org/abstracts/search?q=Nader%20Noroozi%20Pesyan"> Nader Noroozi Pesyan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mina%20Roshani"> Mina Roshani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We describe an efficient method for oxidation of alcohols to related aldehydes and ketones by hydrogen peroxide as oxidizing agent, under reflux conditions. Nano-graphene oxide (NGO) as a heterogeneous catalyst was used and had their activity compared with other various catalysts. This catalyst was found to be an excellent catalyst for oxidation of alcohols. The effects of various parameters, including catalyst type, nature of the substituent in the alcohols and temperature, on the yield of the carboxylic acids were studied. Nano-graphene oxide was synthesized by the oxidation of graphite powders. This nanocatalyst was found to be highly efficient in this reaction and products were obtained in good to excellent yields. The recovered nano-catalyst was successfully reused for several runs without significant loss in its catalytic activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nano-graphene%20oxide" title="nano-graphene oxide">nano-graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidation" title=" oxidation"> oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=aldehyde" title=" aldehyde"> aldehyde</a>, <a href="https://publications.waset.org/abstracts/search?q=ketone" title=" ketone"> ketone</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a> </p> <a href="https://publications.waset.org/abstracts/40536/oxidation-of-alcohols-types-using-nano-graphene-oxide-ngo-as-heterogeneous-catalyst" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40536.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">424</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">1500</span> Effect of Aging Condition on Semisolid Cast 2024 Aluminum Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Wisutmethangoon">S. Wisutmethangoon</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Pannaray"> S. Pannaray</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Plookphol"> T. Plookphol</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Wannasin"> J. Wannasin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 2024 Aluminium alloy was squeezed cast by the Gas Induced Semi Solid (GISS) process. Effect of artificial aging on microstructure and mechanical properties of this alloy was studied in the present work. The solutionized specimens were aged hardened at temperatures of 175°C, 200°C, and 225°C under various time durations. The highest hardness of about 77.7 HRE was attained from specimen aged at the temperature of 175 °C for 36 h. Upon investigation the microstructure by using Transmission Electron Microscopy (TEM), the phase was mainly attributed to the strengthening effect in the aged alloy. The apparent activation energy for precipitation hardening of the alloy was calculated as 133,805 J/mol. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=2024%20aluminium%20alloy" title="2024 aluminium alloy">2024 aluminium alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20induced%20semi%20solid" title=" gas induced semi solid"> gas induced semi solid</a>, <a href="https://publications.waset.org/abstracts/search?q=T6%20heat%20treatment" title=" T6 heat treatment"> T6 heat treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=aged%20hardening" title=" aged hardening"> aged hardening</a>, <a href="https://publications.waset.org/abstracts/search?q=transmission%20electron%20microscopy" title=" transmission electron microscopy"> transmission electron microscopy</a> </p> <a href="https://publications.waset.org/abstracts/4350/effect-of-aging-condition-on-semisolid-cast-2024-aluminum-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4350.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">312</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">1499</span> Characterization of Fish Bone Catalyst for Biodiesel Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sarina%20Sulaiman">Sarina Sulaiman</a>, <a href="https://publications.waset.org/abstracts/search?q=N.Khairudin"> N.Khairudin </a>, <a href="https://publications.waset.org/abstracts/search?q=P.Jamal"> P.Jamal</a>, <a href="https://publications.waset.org/abstracts/search?q=M.Z.%20Alam"> M.Z. Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Zaki%20Zainudin"> Zaki Zainudin</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Azmi"> S. Azmi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, fish bone waste was used as a new catalyst for biodiesel production. Instead of discarding the fish bone waste, it will be utilized as a source for catalyst that can provide significant benefit to the environment. Also, it can be substitute as a calcium oxide source instead of using eggshell, crab shell and snail shell. The XRD and SEM analysis proved that calcined fish bone contains calcium oxide, calcium phosphate and hydroxyapatite. The catalyst was characterized using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calcinations" title="calcinations">calcinations</a>, <a href="https://publications.waset.org/abstracts/search?q=fish%20bone" title=" fish bone"> fish bone</a>, <a href="https://publications.waset.org/abstracts/search?q=transesterification" title=" transesterification"> transesterification</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20catalyst" title=" waste catalyst"> waste catalyst</a> </p> <a href="https://publications.waset.org/abstracts/7717/characterization-of-fish-bone-catalyst-for-biodiesel-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7717.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">304</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">1498</span> Microscopic and Mesoscopic Deformation Behaviors of Mg-2Gd Alloy with or without Li Addition</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jing%20Li">Jing Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Li%20Jin"> Li Jin</a>, <a href="https://publications.waset.org/abstracts/search?q=Fulin%20Wang"> Fulin Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Jie%20Dong"> Jie Dong</a>, <a href="https://publications.waset.org/abstracts/search?q=Wenjiang%20Ding"> Wenjiang Ding</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mg-Li dual-phase alloy exhibits better combination of yield strength and elongation than the Mg single-phase alloy. To exploit its deformation behavior, the deformation mechanisms of Mg-2Gd alloy with or without Li addition, i.e., Mg-6Li-2Gd and Mg-2Gd alloy, have been studied at both microscale and mesoscale. EBSD-assisted slip trace, twin trace, and texture evolution analysis show that the α-Mg phase of Mg-6Li-2Gd alloy exhibits different microscopic deformation mechanisms with the Mg-2Gd alloy, i.e., mainly prismatic <a> slip in the former one, while basal slip, prismatic <a> slip and extension twin in the latter one. Further Schmid factor analysis results attribute this different intra-phase deformation mechanisms to the higher critical resolved shear stress (CRSS) value of extension twin and lower ratio of CRSSprismatic /CRSSbasal in the α-Mg phase of Mg-6Li-2Gd alloy. Additionally, Li addition can induce dual-phase microstructure in the Mg-6Li-2Gd alloy, leading to the formation of hetero-deformation induced (HDI) stress at the mesoscale. This can be evidenced by the hysteresis loops appearing during the loading-unloading-reloading (LUR) tensile tests and the activation of multiple slip activity in the α-Mg phase neighboring β-Li phase. The Mg-6Li-2Gd alloy shows higher yield strength is due to the harder α-Mg phase arising from solid solution hardening of Li addition, as well asthe strengthening of soft β-Li phase by the HDI stress during yield stage. Since the strain hardening rate of Mg-6Li-2Gd alloy is lower than that of Mg-2Gd alloy after ~2% strain, which is partly due to the weak contribution of HDI stress, Mg-6Li-2Gd alloy shows no obvious increase of uniform elongation than the Mg-2Gd alloy.But since the β-Li phase is effective in blunting the crack tips, the Mg-6Li-2Gd alloy shows ununiform elongation, which, thus, leads to the higher total elongation than the Mg-2Gd alloy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mg-Li-Gd%20dual-phase%20alloy" title="Mg-Li-Gd dual-phase alloy">Mg-Li-Gd dual-phase alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20boundary" title=" phase boundary"> phase boundary</a>, <a href="https://publications.waset.org/abstracts/search?q=HDI%20stress" title=" HDI stress"> HDI stress</a>, <a href="https://publications.waset.org/abstracts/search?q=dislocation%20slip%20activity" title=" dislocation slip activity"> dislocation slip activity</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a> </p> <a href="https://publications.waset.org/abstracts/145933/microscopic-and-mesoscopic-deformation-behaviors-of-mg-2gd-alloy-with-or-without-li-addition" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/145933.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">202</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">1497</span> Production of Renewable and Clean Bio-Fuel (DME) from Biomethanol over Copper Modified Alumina Catalyst</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20I.%20Osman">Ahmed I. Osman</a>, <a href="https://publications.waset.org/abstracts/search?q=Jehad%20K.%20Abu-Dahrieh"> Jehad K. Abu-Dahrieh</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20W.%20Rooney"> David W. Rooney</a>, <a href="https://publications.waset.org/abstracts/search?q=Jillian%20Thompson"> Jillian Thompson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The effect of loading of copper on the catalytic performance of different alumina support during the dehydration of methanol to dimethyl ether (DME) was performed in a fixed bed reactor. There are two levels of loading; low loading (1, 2, 4 and 6% Cu wt/wt) and high loading (10 and 15% Cu wt/wt) on both AC350 (alumina catalyst calcined at 350) and AC550 (alumina catalyst calcined at 550), to study the effect of loading and the effect of the support during methanol dehydration to DME (MTD). The catalysts were characterized by TGA, XRD, BET, TPD-NH3, TEM and DRIFT-Pyridine. Under reaction conditions where the temperature ranged from 180-300˚C with a WHSV= 12.1 h-1 it was found that all the catalysts calcined at 550˚C showed higher activity than those calcined at 350˚C. In this study, the optimum catalyst was 6% Cu/AC550. This catalyst showed a high degree of stability, had one half activity of the pure catalyst (AC550) and double the activity of the optimum catalyst calcined at 350˚C (6% Cu/AC350). So, we recommended 6% Cu/AC550 for the production of DME from methanol. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bio-fuel" title="bio-fuel">bio-fuel</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20composite%20catalyst" title=" nano composite catalyst"> nano composite catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=DME" title=" DME"> DME</a>, <a href="https://publications.waset.org/abstracts/search?q=Cu-Al2O3" title=" Cu-Al2O3"> Cu-Al2O3</a> </p> <a href="https://publications.waset.org/abstracts/3494/production-of-renewable-and-clean-bio-fuel-dme-from-biomethanol-over-copper-modified-alumina-catalyst" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3494.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">297</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">1496</span> Structure-Phase States of Al-Si Alloy After Electron-Beam Treatment and Multicycle Fatigue</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Krestina%20V.%20Alsaraeva">Krestina V. Alsaraeva</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20E.%20Gromov"> Victor E. Gromov</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergey%20V.%20Konovalov"> Sergey V. Konovalov</a>, <a href="https://publications.waset.org/abstracts/search?q=Anna%20A.%20Atroshkina"> Anna A. Atroshkina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Processing of Al-19.4Si alloy by high intensive electron beam has been carried out and multiple increase in fatigue life of the material has been revealed. Investigations of structure and surface modified layer destruction of Al-19.4Si alloy subjected to multicycle fatigue tests to fracture have been carried out by methods of scanning electron microscopy. The factors responsible for the increase of fatigue life of Al-19.4Si alloy have been revealed and analyzed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Al-19.4Si%20alloy" title="Al-19.4Si alloy">Al-19.4Si alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20intensive%20electron%20beam" title=" high intensive electron beam"> high intensive electron beam</a>, <a href="https://publications.waset.org/abstracts/search?q=multicycle%20fatigue" title=" multicycle fatigue"> multicycle fatigue</a>, <a href="https://publications.waset.org/abstracts/search?q=structure" title=" structure"> structure</a> </p> <a href="https://publications.waset.org/abstracts/18754/structure-phase-states-of-al-si-alloy-after-electron-beam-treatment-and-multicycle-fatigue" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18754.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">554</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">1495</span> An Investigation of the Strength Deterioration of Forged Aluminum 6082 (T6) Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajveer">Rajveer</a>, <a href="https://publications.waset.org/abstracts/search?q=Abhinav%20Saxena"> Abhinav Saxena</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanjeev%20Das"> Sanjeev Das</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study is focused on the strength of forged aluminum alloy (AA) 6082 (T6). Aluminum alloy 6082 belongs to Al-Mg-Si family which has a wide range of automotive applications. A decrease in the strength of AA 6082 alloy was observed after T6 treatment. The as-received (extruded), forged, and forged + heat treated samples were examined to understand the reason. These examinations were accomplished by optical (OM) and scanning electron microscope (SEM) and X-ray diffraction (XRD) studies. It was observed that the defects had an insignificant effect on the alloy strength. The alloy samples were subjected to age hardening treatment and the time to achieve peak hardening was acquired. Standard tensile specimens were prepared from as-received (extruded), forged, forged + solutionized and forged + solutionized + age hardened. Tensile tests were conducted by Instron universal testing machine. It was observed that there was a significant drop in tensile strength in the case of solutionized sample. The detailed study of the fracture samples showed that the solutionizing after forging was not the best way to increase the strength of Al 6082 alloy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aluminum%20alloy%206082" title="aluminum alloy 6082">aluminum alloy 6082</a>, <a href="https://publications.waset.org/abstracts/search?q=strength" title=" strength"> strength</a>, <a href="https://publications.waset.org/abstracts/search?q=forging" title=" forging"> forging</a>, <a href="https://publications.waset.org/abstracts/search?q=age%20hardening" title=" age hardening"> age hardening</a> </p> <a href="https://publications.waset.org/abstracts/82119/an-investigation-of-the-strength-deterioration-of-forged-aluminum-6082-t6-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82119.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">432</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">1494</span> Comparision of Bioleaching of Metals from Spent Petroleum Catalyst Using Acidithiobacillus Ferrooxidans and Acidthiobacillus Thiooxidans</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Haragobinda%20Srichandan">Haragobinda Srichandan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashish%20Pathak"> Ashish Pathak</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong%20Jin%20Kim"> Dong Jin Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seoung-Won%20Lee"> Seoung-Won Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present investigation deals with bioleaching of spent petroleum catalyst using At. ferrooxidans and At. thiooxidans. The spent catalyst used in the present study was pretreated with acetone to remove the oily hydrocarbons. FESEM and XPS analysis indicated the presence of metals in sulfide and oxide forms in spent catalyst. Both At. ferrooxidans and At. thiooxidans were found to be highly effective in producing the acid. Bioleaching with At. ferrooxidans and At. thiooxidans led to higher recovery of metals compare to control. During bioleaching similar recoveries of metals were obtained using At. ferrooxidans and At. thiooxidans. This might be due to the presence of metals as soluble oxides and sulphides in the spent catalyst. At the end of bioleaching, about 87-90% Ni, 34% Al, 65-73% Mo and 92-97% V were leached using above bacteria. It is elucidated that bioleaching with At. thiooxidans is comparatively more advantageous due to lower cost of sulphur. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=At.%20ferrooxidans" title="At. ferrooxidans">At. ferrooxidans</a>, <a href="https://publications.waset.org/abstracts/search?q=bioleaching" title=" bioleaching"> bioleaching</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20recovery" title=" metal recovery"> metal recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=spent%20catalyst" title=" spent catalyst"> spent catalyst</a> </p> <a href="https://publications.waset.org/abstracts/1872/comparision-of-bioleaching-of-metals-from-spent-petroleum-catalyst-using-acidithiobacillus-ferrooxidans-and-acidthiobacillus-thiooxidans" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1872.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">290</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">1493</span> Optimization of Catalyst Parameters to Get Chlorine Free Bimetallic Catalysts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Noreen%20Sajjad%20Ghulam%20Hussain">Noreen Sajjad Ghulam Hussain</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Catalysts are prepared by simple physical mixing and thermal treatment of support and metal acetate precursors.The effect of metal ratio and metal loading to produce highly active catalyst for the oxidation of benzyl alcohol are studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=catalyst" title="catalyst">catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=acetates" title=" acetates"> acetates</a>, <a href="https://publications.waset.org/abstracts/search?q=benzyl%20alcohols" title=" benzyl alcohols "> benzyl alcohols </a> </p> <a href="https://publications.waset.org/abstracts/1867/optimization-of-catalyst-parameters-to-get-chlorine-free-bimetallic-catalysts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1867.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">436</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">1492</span> Characteristic of Ta Alloy Coating Films on Near-Net Shape with Different Current Densities Using MARC Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Young%20Jun%20Lee">Young Jun Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Tae%20Hyuk%20Lee"> Tae Hyuk Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyoung%20Tae%20Park"> Kyoung Tae Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Jong%20Hyeon%20Lee"> Jong Hyeon Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The harsh atmosphere of the sulfur-iodine process used for producing hydrogen requires better corrosion resistance and mechanical properties that is possible to obtain with pure tantalum. Ta-W alloy is superior to pure tantalum but is difficult to alloy due to its high melting temperature. In this study, substrates of near-net shape (Swagelok® tube ISSG8UT4) were coated with Ta-W using the multi-anode reactive alloy coating (MARC) process in molten salt (LiF-NaF-K2TaF7) at different current densities (1, 2 and 4mA/cm2). Ta-4W coating films of uniform coating thicknesses, without any entrapped salt, were successfully deposited on Swagelok tube by electrodeposition at 1 mA/cm2. The resulting coated film with a corrosion rate of less than 0.011 mm/year was attained in hydriodic acid at 160°C, and hardness up to 12.9 % stronger than pure tantalum coated film. The alloy coating films also contributed to significant enhancement of corrosion resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tantalum" title="tantalum">tantalum</a>, <a href="https://publications.waset.org/abstracts/search?q=tantalum%20alloy" title=" tantalum alloy"> tantalum alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=tungsten%20alloy" title=" tungsten alloy"> tungsten alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=electroplating" title=" electroplating"> electroplating</a> </p> <a href="https://publications.waset.org/abstracts/32956/characteristic-of-ta-alloy-coating-films-on-near-net-shape-with-different-current-densities-using-marc-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32956.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">422</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">1491</span> Preparation and Characterization of Modified ZnO Incorporated into Mesoporous MCM-22 Catalysts and Their Catalytic Performances of Crude Jatropha Oil to Biodiesel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bashir%20Abubakar%20Abdulkadir">Bashir Abubakar Abdulkadir</a>, <a href="https://publications.waset.org/abstracts/search?q=Anita%20Ramli"> Anita Ramli</a>, <a href="https://publications.waset.org/abstracts/search?q=Lim%20Jun%20Wei"> Lim Jun Wei</a>, <a href="https://publications.waset.org/abstracts/search?q=Yoshimitsu%20Uemura"> Yoshimitsu Uemura</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the ZnO/MCM-22 catalyst with different ZnO loading were prepared using conventional wet impregnation process and the catalyst activity was tested for biodiesel production from Jatropha oil. The effects of reaction parameters with regards to catalyst activity were investigated. The synthesized catalysts samples were then characterized by X-ray diffraction (XRD) for crystal phase, Brunauer–Emmett–Teller (BET) for surface area, pore volume and pore size, Field Emission Scanning electron microscope attached to energy dispersive x-ray (FESEM/EDX) for morphology and elemental composition and TPD (NH3 and CO2) for basic and acidic properties of the catalyst. The XRD spectra couple with the EDX result shows the presence of ZnO in the catalyst confirming the positive intercalation of the metal oxide into the mesoporous MCM-22. The synthesized catalyst was confirmed to be mesoporous according to BET findings. Also, the catalysts can be considered as a bifunctional catalyst based on TPD outcomes. Transesterification results showed that the synthesized catalyst was highly efficient and effective to be used for biodiesel production from low grade oil such as Jatropha oil and other industrial application where the high fatty acid methyl ester (FAMEs) yield was achieved at moderate reaction conditions. It was also discovered that the catalyst can be used more than five (5) runs with little deactivation confirming the catalyst to be highly active and stable to the heat of reaction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MCM-22" title="MCM-22">MCM-22</a>, <a href="https://publications.waset.org/abstracts/search?q=synthesis" title=" synthesis"> synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=transesterification" title=" transesterification"> transesterification</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO" title=" ZnO"> ZnO</a> </p> <a href="https://publications.waset.org/abstracts/80401/preparation-and-characterization-of-modified-zno-incorporated-into-mesoporous-mcm-22-catalysts-and-their-catalytic-performances-of-crude-jatropha-oil-to-biodiesel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80401.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">207</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">1490</span> Effect of Y Addition on the Microstructure and Mechanical Properties of Sn-Zn Eutectic Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jung-Ho%20Moon">Jung-Ho Moon</a>, <a href="https://publications.waset.org/abstracts/search?q=Tae%20Kwon%20Ha"> Tae Kwon Ha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The effect of Yttrium addition on the microstructure and mechanical properties of Sn-Zn eutectic alloy, which has been attracting intensive focus as a Pb-free solder material, was investigated in this study. Phase equilibrium has been calculated by using FactSage® to evaluate the composition and fraction of equilibrium intermetallic compounds and construct a phase diagram. In the case of Sn-8.8 Zn eutectic alloy, the as-cast microstructure was typical lamellar. With addition of 0.25 wt. %Y, a large amount of pro-eutectic phases have been observed and various YZnx intermetallic compounds were expected to successively form during cooling. Hardness of Sn-8.8 Zn alloy was not affected by Y-addition and both alloys could be rolled by 90% at room temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sn-Zn%20eutectic%20alloy" title="Sn-Zn eutectic alloy">Sn-Zn eutectic alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=yttrium" title=" yttrium"> yttrium</a>, <a href="https://publications.waset.org/abstracts/search?q=FactSage%C2%AE" title=" FactSage®"> FactSage®</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a> </p> <a href="https://publications.waset.org/abstracts/7127/effect-of-y-addition-on-the-microstructure-and-mechanical-properties-of-sn-zn-eutectic-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7127.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">469</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">1489</span> Synthesis of α-Diimin Nickel(II) Catalyst Supported on Graphene and Graphene Oxide for Ethylene Slurry Polymerization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehrji%20Khosravan">Mehrji Khosravan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Fathali-Sianib"> Mostafa Fathali-Sianib</a>, <a href="https://publications.waset.org/abstracts/search?q=Davood%20Soudbar"> Davood Soudbar</a>, <a href="https://publications.waset.org/abstracts/search?q=Sasan%20Talebnezhad"> Sasan Talebnezhad</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad-Reza%20Ebrahimi"> Mohammad-Reza Ebrahimi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The late transition metal catalyst of the end group of transition metals in the periodic table as Ni, Fe, Co, and Pd was grown up rapidly in polyolefin industries recently. These metals with suitable ligands exhibited special characteristic properties and appropriate activities in the production of polyolefins. The ligand 1,4-bis (2,6-diisopropyl phenyl) acenaphthene was synthesized by reaction of 2,6-diisopropyl aniline and acenaphthenequinone. The ligand was added to nickel (II) dibromide salt for synthesis the 1,4-bis (2,6 diisopropylphenyl) acenaphthene nickel (II) dibromide catalyst. The structure of the ligand characterized by IR technique. The catalyst then deposited on graphene and graphene oxide by vander walss-attachment for use in Ethylene slurry polymerization process in the presence of catalyst activator such as methylaluminoxane (MAO) in hexane solvent. The structure of the catalyst characterized by IR and TEM techniques and some of the polymers were characterized by DSC. The highest activity was achieved at 600 C for catalyst. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%CE%B1-diimine%20nickel%20%28II%29%20complex" title="α-diimine nickel (II) complex">α-diimine nickel (II) complex</a>, <a href="https://publications.waset.org/abstracts/search?q=graphene%20as%20supported%20catalyst" title=" graphene as supported catalyst"> graphene as supported catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=late%20transition%20metal" title=" late transition metal"> late transition metal</a>, <a href="https://publications.waset.org/abstracts/search?q=ethylene%20polymerization" title=" ethylene polymerization"> ethylene polymerization</a> </p> <a href="https://publications.waset.org/abstracts/22317/synthesis-of-a-diimin-nickelii-catalyst-supported-on-graphene-and-graphene-oxide-for-ethylene-slurry-polymerization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22317.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">386</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">1488</span> Microswitches with Sputtered Au, Aupd, Au-on-Aupt, and Auptcu Alloy - Electric Contacts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nikolay%20Konukhov">Nikolay Konukhov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper to report on a new analytic model for predicting microcontact resistance and the design, fabrication, and testing of microelectromechanical systems (MEMS) metal contact switches with sputtered bimetallic (i.e., gold (Au)-on-Au-platinum (Pt), (Au-on-Au-(6.3at%)Pt)), binary alloy (i.e., Au-palladium (Pd), (Au-(3.7at%)Pd)), and ternary alloy (i.e., Au-Pt-copper (Cu), (Au-(5.0at%)Pt-(0.5at%)Cu)) electric contacts. The microswitches with bimetallic and binary alloy contacts resulted in contact resistance values between 1–2 <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alloys" title="alloys">alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=electric%20contacts" title=" electric contacts"> electric contacts</a>, <a href="https://publications.waset.org/abstracts/search?q=microelectromechanical%20systems%20%28MEMS%29" title=" microelectromechanical systems (MEMS)"> microelectromechanical systems (MEMS)</a>, <a href="https://publications.waset.org/abstracts/search?q=microswitch" title=" microswitch"> microswitch</a> </p> <a href="https://publications.waset.org/abstracts/139320/microswitches-with-sputtered-au-aupd-au-on-aupt-and-auptcu-alloy-electric-contacts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139320.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">172</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">1487</span> Relationship between Extrusion Ratio and Mechanical Properties of Magnesium Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20H.%20Jeon">C. H. Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20H.%20Kim"> Y. H. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20A.%20Lee"> G. A. Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Reducing resource consumption and carbon dioxide emission are recognized as urgent issues. One way of resolving these issues is to reduce product weight. Magnesium alloys are considered promising candidates because of their lightness. Various studies have been conducted on using magnesium alloy instead of conventional iron or aluminum in mechanical parts, due to the light weight and superior specific strength of magnesium alloy. However, even stronger magnesium alloys are needed for mechanical parts. One common way to enhance the strength of magnesium alloy is by extruding the ingot. In order to enhance the mechanical properties, magnesium alloy ingot were extruded at various extrusion ratios. Relationship between extrusion ratio and mechanical properties was examined on extruded material of magnesium alloy. And Textures and microstructures of the extruded materials were investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=extrusion" title="extrusion">extrusion</a>, <a href="https://publications.waset.org/abstracts/search?q=extrusion%20ratio" title=" extrusion ratio"> extrusion ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=magnesium" title=" magnesium"> magnesium</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20property" title=" mechanical property"> mechanical property</a>, <a href="https://publications.waset.org/abstracts/search?q=lightweight%20material" title=" lightweight material"> lightweight material</a> </p> <a href="https://publications.waset.org/abstracts/30018/relationship-between-extrusion-ratio-and-mechanical-properties-of-magnesium-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30018.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">500</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">1486</span> Pressure Induced Phase Transition of Semiconducting Alloy TlxGa1-xAs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Madhu%20Sarwan">Madhu Sarwan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ritu%20Dubey"> Ritu Dubey</a>, <a href="https://publications.waset.org/abstracts/search?q=Sadhna%20Singh"> Sadhna Singh </a> </p> <p class="card-text"><strong>Abstract:</strong></p> We have investigated the structural phase transition from Zinc-Blende (ZB) to Rock-Salt (RS) structure of TlxGa1-xAs by using Interaction Potential Model (IPM). The IPM consists of Coulomb interaction, Three-Body Interaction (TBI), Van Der Wall (vdW) interaction and overlap repulsive short range interaction. The structural phase transition has been computed by using the vegard’s law. The volume collapse is also computed for this alloy. We have also investigated the second order elastic constants with composition for the alloy TlxGa1-xAs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=III-V%20alloy" title="III-V alloy">III-V alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20moduli" title=" elastic moduli"> elastic moduli</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20transition" title=" phase transition"> phase transition</a>, <a href="https://publications.waset.org/abstracts/search?q=semiconductors" title=" semiconductors"> semiconductors</a> </p> <a href="https://publications.waset.org/abstracts/30417/pressure-induced-phase-transition-of-semiconducting-alloy-tlxga1-xas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30417.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">543</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">1485</span> Phase Equilibria in Zn-Al-Sn Alloy for Lead-free Solder Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ji%20Chan%20Kim">Ji Chan Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seok%20Hong%20Min"> Seok Hong Min</a>, <a href="https://publications.waset.org/abstracts/search?q=Tae%20Kwon%20Ha"> Tae Kwon Ha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The effect of Yttrium addition on the microstructure and mechanical properties of Sn-Zn eutectic alloy, which has been attracting intensive focus as a Pb-free solder material, was investigated in this study. Phase equilibrium has been calculated by using FactSage® to evaluate the composition and fraction of equilibrium intermetallic compounds and construct a phase diagram. In the case of Sn-8.8 Zn eutectic alloy, the as-cast microstructure was typical lamellar. With addition of 0.25 wt. %Y, a large amount of pro-eutectic phases have been observed and various YZnx intermetallic compounds were expected to successively form during cooling. Hardness of Sn-8.8 Zn alloy was not affected by Y-addition and both alloys could be rolled by 90% at room temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lead-free%20solder" title="lead-free solder">lead-free solder</a>, <a href="https://publications.waset.org/abstracts/search?q=zn-al-sn%20alloy" title=" zn-al-sn alloy"> zn-al-sn alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20equilibrium" title=" phase equilibrium"> phase equilibrium</a>, <a href="https://publications.waset.org/abstracts/search?q=rolling" title=" rolling"> rolling</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=hardness" title=" hardness"> hardness</a> </p> <a href="https://publications.waset.org/abstracts/35718/phase-equilibria-in-zn-al-sn-alloy-for-lead-free-solder-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35718.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">308</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">1484</span> Effect of Chromium Behavior on Mechanical and Electrical Properties Of P/M Copper-Chromium Alloy Dispersed with VGCF</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hisashi%20Imai">Hisashi Imai</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuan-Yu%20Chen"> Kuan-Yu Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Katsuyoshi%20Kondoh"> Katsuyoshi Kondoh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hung-Yin%20Tsai"> Hung-Yin Tsai</a>, <a href="https://publications.waset.org/abstracts/search?q=Junko%20Umeda"> Junko Umeda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Microstructural and electrical properties of copper-chromium alloy (Cu-Cr) dispersed with vapor-grown carbon fiber (VGCF) prepared by powder metallurgy (P/M) process have been investigated. Cu-0.7 mass% Cr pre-alloyed powder (Cu-Cr) made by water atomization process was used as raw materials, which contained solid solute Cr elements in Cu matrix. The alloy powder coated with un-bundled VGCF by using oil coating process was consolidated at 1223 K in vacuum by spark plasma sintering, and then extruded at 1073 K. The extruded Cu-Cr alloy (monolithic alloy) had 209.3 MPa YS and 80.4 IACS% conductivity. The extruded Cu-Cr with 0.1 mass% VGCF composites revealed a small decrease of YS compared to the monolithic Cu-Cr alloy. On the other hand, the composite had a higher electrical conductivity than that of the monolithic alloy. For example, Cu-Cr with 0.1 mass% VGCF composite sintered for 5 h showed 182.7 MPa YS and 89.7 IACS% conductivity. In the case of Cu-Cr with VGCFs composites, the Cr concentration was observed around VGCF by SEM-EDS analysis, where Cr23C6 compounds were detected by TEM observation. The amount of Cr solid solution in the matrix of the Cu-Cr composites alloy was about 50% compared to the monolithic Cu-Cr sintered alloy, and resulted in the remarkable increment of the electrical conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=powder%20metallurgy%20Cu-Cr%20alloy%20powder" title="powder metallurgy Cu-Cr alloy powder">powder metallurgy Cu-Cr alloy powder</a>, <a href="https://publications.waset.org/abstracts/search?q=vapor-grown%20carbon%20fiber" title=" vapor-grown carbon fiber"> vapor-grown carbon fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a> </p> <a href="https://publications.waset.org/abstracts/24251/effect-of-chromium-behavior-on-mechanical-and-electrical-properties-of-pm-copper-chromium-alloy-dispersed-with-vgcf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24251.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">493</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">1483</span> Cellulose Supported Heterogeneous Pd(II) Catalyst for Synthesis of Biaryls</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Talat%20Baran">Talat Baran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Suzuki C(sp2)-C(sp2) coupling reaction is considered to be one of the best ways for the synthesis of biaryl compounds. There are many studies reporting the catalytic performance of palladium catalyst in Suzuki coupling reactions. Natural biopolymer (such as zeolite, carbon, silica, and chitosan) supporting catalysts have been lately attracted interest because of their low-cost, nontoxicity, and eco-friendliness. One of the most important natural biopolymer is cellulose, which is widely considered as an eco-friendly biopolymer due to its biodegradable, non-toxic and renewable nature. In this study, (1) cellulose supported Pd(II) catalyst was synthesized (2) its chemical structure was characterized by FT-IR, SEM/EDAX, XRD, TG-DTG, ICP-OES techniques (3) to investigate the performance of the catalyst in Suzuki coupling reactions by using microwave irradiation technique (4) reusability of the catalyst was done under optimum conditions. This cellulose supported Pd(II) catalyst exhibited high selectivity and efficiency in Suzuki coupling reactions under mild conditions (50°C). High TON and TOF values were recorded for the catalyst. Also, the reusability tests showed the catalysts could be used for several times in consequence of reusability tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=palladium" title="palladium">palladium</a>, <a href="https://publications.waset.org/abstracts/search?q=cellulose" title=" cellulose"> cellulose</a>, <a href="https://publications.waset.org/abstracts/search?q=Schiff%20base" title=" Schiff base"> Schiff base</a>, <a href="https://publications.waset.org/abstracts/search?q=reusability" title=" reusability"> reusability</a> </p> <a href="https://publications.waset.org/abstracts/54022/cellulose-supported-heterogeneous-pdii-catalyst-for-synthesis-of-biaryls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54022.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">252</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">1482</span> Reduction of Wear via Hardfacing of Rotavator Blades</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gurjinder%20Singh%20Randhawa">Gurjinder Singh Randhawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Jonny%20Garg"> Jonny Garg</a>, <a href="https://publications.waset.org/abstracts/search?q=Sukhraj%20Singh"> Sukhraj Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Gurmeet%20Singh%20Cheema"> Gurmeet Singh Cheema</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A major problem related to the use of rotavator is wear of rotavator blades due to abrasion by soil hard particles, as it seriously affects tillage quality and agricultural production economy. The objective of this study was to increase the wear resistance by covering the rotavator blades with two different hard facing electrodes. These blades are generally produced from low carbon or low alloy steel. During the field work i.e. preparing land for the cultivation these blades are subjected to severe wear conditions. Comparative wear tests on a regular rotavator blade and two kinds of hardfacing with electrodes were conducted in the field. These two different hardfacing electrodes, which are designated HARD ALLOY-400 and HARD ALLOY-650, were used for hardfacing. The wear rate in the field tests was found to be significantly different statistically. When the cost is taken into consideration; HARD ALLOY-650 and HARD ALLOY-400 have been found to be the best hardfacing electrodes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hardfacing" title="hardfacing">hardfacing</a>, <a href="https://publications.waset.org/abstracts/search?q=rotavator%20blades" title=" rotavator blades"> rotavator blades</a>, <a href="https://publications.waset.org/abstracts/search?q=hard%20alloy-400" title=" hard alloy-400"> hard alloy-400</a>, <a href="https://publications.waset.org/abstracts/search?q=abrasive%20wear" title=" abrasive wear"> abrasive wear</a> </p> <a href="https://publications.waset.org/abstracts/52466/reduction-of-wear-via-hardfacing-of-rotavator-blades" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52466.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">425</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">1481</span> The Effect of Ni/Dolomite Catalyst for Production of Hydrogen from NaBH₄</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Burcu%20Kiren">Burcu Kiren</a>, <a href="https://publications.waset.org/abstracts/search?q=Alattin%20CAkan"> Alattin CAkan</a>, <a href="https://publications.waset.org/abstracts/search?q=Nezihe%20Ayas"> Nezihe Ayas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen will be arguably the best fuel in the future as it is the most abundant element in the universe. Hydrogen, as a fuel, is notably environmentally benign, sustainable and has high energy content compared to other sources of energy. It can be generated from both conventional and renewable sources. The hydrolysis reaction of metal hydrides provides an option for hydrogen production in the presence of a catalyst. In this study, Ni/dolomite catalyst was synthesized by the wet impregnation method for hydrogen production by hydrolysis reaction of sodium borohydride (NaBH4). Besides, the synthesized catalysts characterizations were examined by means of thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Brunauer –Emmett – Teller (BET) and scanning electron microscopy (SEM). The influence of reaction temperature (25-75 °C), reaction time (15-60 min.), amount of catalyst (50-250 mg) and active metal loading ratio (20,30,40 wt.%) were investigated. The catalyst prepared with 30 wt.% Ni was noted as the most suitable catalyst, achieving of 35.18% H₂ and hydrogen production rate of 19.23 mL/gcat.min at 25 °C at reaction conditions of 5 mL of 0.25 M NaOH and 100 mg NaBH₄, 100 mg Ni/dolomite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sodium%20borohydride" title="sodium borohydride">sodium borohydride</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrolysis" title=" hydrolysis"> hydrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=catalyst" title=" catalyst"> catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=Ni%2Fdolomite" title=" Ni/dolomite"> Ni/dolomite</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen" title=" hydrogen"> hydrogen</a> </p> <a href="https://publications.waset.org/abstracts/128593/the-effect-of-nidolomite-catalyst-for-production-of-hydrogen-from-nabh4" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/128593.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">166</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">1480</span> Dependence of Ionomer Loading on the Hydrogen Generation Rate of a Proton Exchange Membrane Electrolyzer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yingjeng%20James%20Li">Yingjeng James Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Chih%20Chi%20Hsu"> Chih Chi Hsu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiao-Chih%20Hu"> Chiao-Chih Hu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane electrode assemblies MEAs for proton exchange membrane PEM water electrolyzers were prepared by employing 175um perfluorosulfonic acid PFSA membranes as the PEM, onto which iridium oxide catalyst was coated on one side as the anode and platinum catalyst was coated on the other side as the cathode. The cathode catalyst ink was prepared so that the weight ratio of the catalyst powder to ionomer was 75:25, 70:30, 65:35, 60:40, and 55:45, respectively. Whereas, the ratio of catalyst powder to ionomer of the anode catalyst ink keeps constant at 50:50. All the MEAs have a catalyst coated area of 5cm*5cm. The test cell employs a platinum plated titanium grid as anode gas diffusion media; whereas, carbon paper was employed as the cathode gas diffusion media. The measurements of the MEA gases production rate were carried out by holding the cell voltage ranging from 1.6 to 2.8 volts at room temperature. It was found that the MEA with cathode catalyst to ionomer ratio of 65:35 gives the largest hydrogen production rate which is 2.8mL/cm2*min. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrolyzer" title="electrolyzer">electrolyzer</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20electrode%20assembly" title=" membrane electrode assembly"> membrane electrode assembly</a>, <a href="https://publications.waset.org/abstracts/search?q=proton%20exchange%20membrane" title=" proton exchange membrane"> proton exchange membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=ionomer" title=" ionomer"> ionomer</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen" title=" hydrogen"> hydrogen</a> </p> <a href="https://publications.waset.org/abstracts/72426/dependence-of-ionomer-loading-on-the-hydrogen-generation-rate-of-a-proton-exchange-membrane-electrolyzer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72426.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">255</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">1479</span> Impregnation Reduction Method for the Preparation of Platinum-Nickel/Carbon Black Alloy Nanoparticles as Faor Electrocatalyst</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Kiani">Maryam Kiani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to enhance the efficiency and stability of an electrocatalyst for formic acid electro-oxidation reaction (FAOR), we developed a method to create Pt/Ni nanoparticles with carbon black. These nanoparticles were prepared using a simple impregnation reduction technique. During the observation, it was found that the nanoparticles had a spherical shape. Additionally, the average particle size remained consistent, falling within the range of about 4 nm. This approach aimed to obtain a loaded Pt-based electrocatalyst that would exhibit improved performance and stability when used in FAOR applications. By utilizing the impregnation reduction method and incorporating Ni nanoparticles along with Pt, we sought to enhance the catalytic properties of the material. By incorporating Ni atoms into the Pt structure, the electronic properties of Pt are modified, resulting in a delay in the chemisorption of harmful CO intermediate species. This modification also promotes the dehydrogenation pathway of the formic acid oxidation reaction (FAOR). Through electrochemical analysis, it has been observed that the Pt3Ni-C catalyst exhibits enhanced performance in FAOR compared to traditional Pt catalysts. This means that the addition of Ni atoms improves the efficiency and effectiveness of the Pt3Ni-C catalyst in facilitating the FAOR process. Overall, the utilization of these alloy nanoparticles as electrocatalysts represents a significant advancement in fuel cell technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrocatalyst" title="electrocatalyst">electrocatalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=impregnation%20reduction%20method" title=" impregnation reduction method"> impregnation reduction method</a>, <a href="https://publications.waset.org/abstracts/search?q=formic%20acid%20electro-oxidation%20reaction" title=" formic acid electro-oxidation reaction"> formic acid electro-oxidation reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20cells" title=" fuel cells"> fuel cells</a> </p> <a href="https://publications.waset.org/abstracts/173326/impregnation-reduction-method-for-the-preparation-of-platinum-nickelcarbon-black-alloy-nanoparticles-as-faor-electrocatalyst" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173326.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">126</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=Pt-Sn%20alloy%20catalyst&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=5">5</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=6">6</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=7">7</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=8">8</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=9">9</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=10">10</a></li> <li class="page-item disabled"><span class="page-link">...</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=50">50</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=51">51</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Pt-Sn%20alloy%20catalyst&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul 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