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题名: Exerting the structural advantages of Ir-in-CeO2 and Ir-on-CeO2 to widen the operating temperature window for preferential CO oxidation
作者: Lin, Jian1, 2;  Huang, Yanqiang1;  Li, Lin1;  Qiao, Botao1;  Wang, Xiaodong1;  Wang, Aiqin1;  Zhang, Tao1
关键词: Ir-in-CeO2 ;  Ir-on-CeO2 ;  Preferential CO oxidation ;  Dual bed ;  Temperature window
刊名: CHEMICAL ENGINEERING JOURNAL
发表日期: 2011-04-01
DOI: 10.1016/j.cej.2011.01.081
卷: 168, 期:2, 页:822-826
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: The activities of Ir-in-CeO2 (Ir embedded in CeO2) and Ir-on-CeO2 (Ir dispersed on the surface of CeO2) in preferential CO oxidation were comparatively studied in terms of their specific structures with different amount of surface Ir. It was found that the surface exposed Ir sites on Ir-on-CeO2 were favorable for CO oxidation at low temperature (<100 degrees C). Encapsulating Ir in CeO2 inhibited the adsorption of H-2, and also facilitated the activation of surface CeO2 on Ir-in-CeO2, which promised a high CO conversion at high temperature (>120 degrees C). Then a dual bed system with the top Ir-in-CeO2 and the bottom Ir-on-CeO2 was developed to widen the temperature window. This dual bed system is unique in affording a high CO conversion in a wide temperature window, from 80 to 200 degrees C, which is superior to single bed catalyst. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: SUPPORTED IRIDIUM CATALYSTS ;  WATER-GAS SHIFT ;  CARBON-MONOXIDE ;  HYDROGEN PROX ;  CERIA ;  ADSORPTION ;  REDUCTION ;  NOX ;  REACTOR ;  PT/CEO2
语种: 英语
WOS记录号: WOS:000290133700040
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142671
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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Lin, Jian,Huang, Yanqiang,Li, Lin,et al. Exerting the structural advantages of Ir-in-CeO2 and Ir-on-CeO2 to widen the operating temperature window for preferential CO oxidation[J]. CHEMICAL ENGINEERING JOURNAL,2011,168(2):822-826.
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