Steam reforming of ethanol for production of hydrogen over Ni/CeO₂–ZrO₂ catalyst: Effect of support and metal loading

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• 作者：Prakash Biswas ; Deepak Kunzru
• 关键词：Ni/CeOration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml259&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=8d0b0172a221d3ee9d3c57cb739cac47"
• 刊名：International Journal of Hydrogen Energy
• 出版年：2007
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：June 2007
• 卷：32
• 期：8
• 页码：969-980
• 文件大小：531 K

摘要

Steam reforming (SR) of ethanol for hydrogen production was investigated over Ni/Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml232&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=40b147de0c5fc547e7fb0f8ef3c0c606" title="Click to view the MathML source">_1-xZrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml233&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=1d10736bd34956b76e8143b6eae0f03e" title="Click to view the MathML source">_xOration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml234&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=f93612f3a156ef6ce795960eee3f9609" title="Click to view the MathML source">₂ (ration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml235&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=51a611edda2be4407c859ae4838dee61" title="Click to view the MathML source">x=0, 0.26, 0.59, 0.84 and 1) catalyst prepared by co-precipitation and incipient wetness impregnation technique. The effect of support composition as well as metal loading on SR reaction was studied in a downflow tubular fixed bed reactor at atmospheric pressure with an ethanol/water molar ratio of 1:8, over a temperature range of 400 to 650 ration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml236&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=a708412163f07c62a0304641bdc11d03" title="Click to view the MathML source">C. The catalysts were characterized by various techniques, such as surface area, temperature-programmed reduction (TPR), X-ray diffraction (XRD) and Hration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml237&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=9b390f32f18cb46b427cc0832239232e" title="Click to view the MathML source">₂ chemisorption. The XRD results confirmed the formation of mixed oxide solution. TPR results revealed that, compared to pure oxide support, strong interaction exists between the mixed oxide support and metal. Among the catalyst examined, Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml238&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=41869fd487cebbbc06c1f3ae720c33b2" title="Click to view the MathML source">_0.41Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml239&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=6d7c72b47e2fc7ccd02c6c6892b1d1a0" title="Click to view the MathML source">_0.59Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml240&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=58baf61063133ea3f4ccf8dcd19bcfc0" title="Click to view the MathML source">₂ and Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml241&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=be9b23701c5e2774e4c98b190b7395bb" title="Click to view the MathML source">_0.16Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml242&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=9c20b701f1c9cd5435c35de78179cfb2" title="Click to view the MathML source">_0.84Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml243&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=44d1c5f3e6e5570084507b4461b93c3c" title="Click to view the MathML source">₂ supports were the least active and Ni/Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml244&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=a25e048c511364329d5fbc1c275adde5" title="Click to view the MathML source">_0.74Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml245&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=ed678ba516d1f15bf90185fbf1620641" title="Click to view the MathML source">_0.26Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml246&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=b3b31ed1b15b3a938099167ba5a230b6" title="Click to view the MathML source">₂ catalyst with 30 wt%metal loading exhibited high catalytic activity and hydrogen selectivity (5.8 mol/mol of ethanol reacted) at a temperature of 600 ration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml247&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=f7085c3f25c1e03b4bae69dbfe2af8ad" title="Click to view the MathML source">C. At this temperature, the ethanol conversion was 100%and the selectivities of CO, CHration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml248&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=224d35d29267c8a556c4b5a7cfeee93a" title="Click to view the MathML source">₄, COration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml249&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=7517d1d6c34a070996befc07b875fe1b" title="Click to view the MathML source">₂ were 0.47, 0.33, 1.15 mol/mol of ethanol reacted, respectively. For nickel supported on Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml250&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=f59dded3e0dfdb37c209b18e4862e79f" title="Click to view the MathML source">_0.74Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml251&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=3be01076fc095295b9c08b285a97c3a6" title="Click to view the MathML source">_0.26Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml252&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=910bbd6ecf761a1a62d0849ee6413511" title="Click to view the MathML source">_2,the activity was found to correlate with the hydrogen consumed during TPR. Another reason for the high activity of 30 wt%Ni/Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml253&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=109b95e42fff656d3f18e9e8de71b36b" title="Click to view the MathML source">_0.74Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml254&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=8f30b23ef6076ec5d2aa5964afd576ce" title="Click to view the MathML source">_0.26Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml255&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=bbebdc141a925cfe3d383cd03ee4db7d" title="Click to view the MathML source">₂ could be due to the high oxygen storage capacity of cubic Ceration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml256&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=ec3cd60b475a0f53cf6736d8e93b1931" title="Click to view the MathML source">_0.74Zrration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml257&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=256bf0e9dbc5817a9465c5692476493a" title="Click to view the MathML source">_0.26Oration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4M93P3S-1&_mathId=mml258&_user=10&_cdi=5729&_rdoc=8&_acct=C000050221&_version=1&_userid=10&md5=e57b35e9bd01654278e696245e87c56c" title="Click to view the MathML source">₂. This helps to increase the availability of surface oxygen.