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2012 饪让孑报 Chi nese J ournalofCatal ysi s 、，01．33No．2 文章编号：0253-9837( 2012) 02-0281-09 国际版DOI：10．1016／S1872．2067(1 1)60335· 5 研究论文：281-289 柠檬酸络合法制备的Co／Ce02催化剂上中温乙醇水蒸气重整性能 庞潇。卵侵+，代瑞旗，崔 鹏 合肥工业大学化工学院，安徽合肥230009 摘要：采用柠檬酸络合法制备了Co／Ce02及其钙掺杂系列催化剂，并对催化剂进行了低温N2物理吸附、X射线衍射、H2程序 升温还原、傅里叶变换红外光谱、高分辨透射电镜表征以及乙醇水蒸气重整催化性能测试．结果表明，所制Co／CeO：催化剂具 有良好的乙醇水蒸气重整催化性能，500。C时乙醇能哞：部转化为cl ，氢气产率高达85％以上．Ca掺杂减小了载体Ce02纳米 颗粒尺寸，但对还原后Coo尺寸的影响较。盋a掺杂量大于5．O％时，催化剂氧化还原性能和乙醇水蒸气重整催化性能下 降．较高的还原温度有利于体相Ce4+还原为Ce” ，并且提高了催化活性，认为金属．氧化物边界的增加提高了催化活性．初步 稳定性考察结果表明。5％钙掺杂后的催化剂具有更好的抗积炭性能． 关键词：钴；氧化铈；氧化钙掺杂；柠檬酸络合；乙醇水蒸气重整：中温 中图分类号：0643 文献标识码：A 收稿日期：2011-09．15．接受日期：2011-l O．26． ‘ 通讯联系人．电话：(0551)2901450；电子信箱：chenyazhong@hfut．edu．cn 基金来源：国家自然科学基金( 20876030) ；安徽省自然科学基金( 110406Q31) ． 本文的英文电子版(国际版)由El sevi er出版社在Sci enceDi rect．．E出版(http：／／www．sci encedi rect．corn／sci ence／j ournal ／18722067) Co／Ce02 Catal ysts Prepared Usi ngCi tri c Aci dCompl exi ngfor Ethanol SteamRef ormi ng PANGXi aoj i an，CHENYazhong+，DAI Rui qi ，CUI Peng SchoolofChemi cal Engi neeri ng, Hefei Uni versi ty ofTechnol ogy, Hefei 230009, AnhuL Chi na Abstract：Co／Ce02 catal ystswi th and wi thout cal ci umdopi ngwereprepared bythe ci tri c aci dcompl exi ngmethod，andcharacteri zedby N2 adsorpti on，X-ray di ffracti on，temperature-programmed reducti on，Fouri er transformi nfraredspec仃oscopy, and hi ghresol uti on transmi ssi on el ectronmi croscope．111ei r eatal yti c performancemeasurement for ethanol steamref ormi ng( ESR) at400- - 650 oC andatmospheri c pressure wi th a steam-to-carbon rati o of 3．0 andgas hourl y space vel oci ty of 50000ml ／(g‘ h1was measured．111e ci tri c aci dcompl exi ngmethod en- hancedmetal —supporti nteracti on．111eCo／Ce02catal ysts gaveal most 1 00％ethanol conversi on andgood hydrogen yi el dat 500 oC．Cal ci um dopi ngi n thecatal ystreduced theparti cl esi zeofCe02，but had l i nl e effect on themetal l i c cobal t si ze after reducti on．Cal ci umdopi ng hi g}l er than 5％deteri orated the redoxpropeai esand ESRcatal yti c performance，whi chwas attri buted to thefoul i ngof Ce02 by CoO．Catal ysts acti vated at 650℃showed a beRer performance．whi chWas due to ahi gher reducti ondegreeof ceri aand i ncreaseof the metal —oxi de i nter- face．Stabi l i ty i nvesti gati onofthecatal ysts suggestedthat 5％cal ci umdopi ngenhanced carbondeposi ti onresi stance． Key words：cobal t；ceri a；cal ci umdopi ng；ci tri caci dcompl exi ng；ethanolsteamreformi ng；i ntermedi ate temperature Recei ved 15September 2011．Accepted26 October 2011． *Correspondi ng author．Tel ：+86-551—2901450；E-mai l ：chenyazhong@hfut．edu．en Thi s work wassupportedby the Nati onal Natural Sci ence Foundati onofChi na( 20876030) andNatural Sci ence Foundati onofAnhuiProv- i nce H10406Q3 1)． Engl i shedi ti on avai l abl eonl i ne at El sevi erSci enceDi rect(http：／／www．sci encedi rect．com／sci ence／j ournal ／18722067)． Hydrogen producti onfrom vari oushydrocarbonand al — cohol fuel s has been a focus ofi nvesti gati on recentl y【l 】． Bi n- ethanol fromthe fermentati on of organi cmatter i s el l — vi ronmental l y sustai nabl e andbeni gn【2】．Ethanol steam 万方数据