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题名: Hydrogen production from ethanol over Ir/CeO2 catalysts: A comparative study of steam reforming, partial oxidation and oxidative steam reforming
作者: Cai, Weijie1;  Wang, Fagen1;  Zhan, Ensheng1;  Van Veen, A. C.2;  Mirodatos, Claude2;  Shen, Wenjie1
关键词: ethanol ;  hydrogen ;  Ir/CeO2 ;  reaction pathway ;  stability
刊名: JOURNAL OF CATALYSIS
发表日期: 2008-07-01
DOI: 10.1016/j.jcat.2008.04.009
卷: 257, 期:1, 页:96-107
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Steam reforming, partial oxidation, and oxidative steam reforming of ethanol over Ir/CeO2 catalysts were studied to elucidate the reaction pathway and determine catalytic stability. Temperature-programmed desorption and surface reaction revealed that ethoxy species were immediately formed on ethanol adsorption at room temperature, and were mainly further oxidized to acetate and carbonate species that finally decomposed into CH4/CO and CO2, respectively. Under reaction conditions, acetalclehyde was the primary product below 673 K, which decomposed mainly to methane and carbon monoxide at higher temperatures, whereas methane reforming and the water-gas shift were the major reactions above 773 K. The Ir/CeO2 catalyst demonstrated rather high stability for the reactions at 823 and 923 K with no apparent deactivation for 60 h on stream; the mean size of It particles was stable at around 2-3 nm, but the ceria particles sintered significantly from 6-8 to 14-27 nm. CeO2 likely prevented the highly dispersed It particles from sintering and inhibited coke deposition through strong Ir-CeO2 interactions. (c) 2008 Elsevier Inc. All rights reserved.
关键词[WOS]: FUEL-CELL APPLICATIONS ;  TEMPERATURE-PROGRAMMED DESORPTION ;  BIOMASS-DERIVED ETHANOL ;  NOBLE-METAL CATALYSTS ;  CARBON-CARBON BOND ;  NI-BASED CATALYSTS ;  SITU FT-IR ;  BIO-ETHANOL ;  H-2 PRODUCTION ;  RH
语种: 英语
WOS记录号: WOS:000257810500012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141084
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Lyon 1, CNRS, IRCELYON, UMR 5256,Univ Lyon, F-69626 Villeurbanne, France

Recommended Citation:
Cai, Weijie,Wang, Fagen,Zhan, Ensheng,et al. Hydrogen production from ethanol over Ir/CeO2 catalysts: A comparative study of steam reforming, partial oxidation and oxidative steam reforming[J]. JOURNAL OF CATALYSIS,2008,257(1):96-107.
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