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题名: Hydrogen production by steam reforming of dimethyl ether over ZnO-Al2O3 bi-functional catalyst
作者: Yang, Mei1, 2;  Men, Yong1;  Li, Shulian1;  Chen, Guangwen1
关键词: Dimethyl ether ;  H-2 production ;  Bi-functional catalyst ;  ZnAl2O4 ;  Steam reforming
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2012-05-01
DOI: 10.1016/j.ijhydene.2012.02.070
卷: 37, 期:10, 页:8360-8369
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: A series of ZnO-Al2O3 catalysts with various ZnO/(ZnO + Al2O3) molar ratios have been developed for hydrogen production by dimethyl ether (DME) steam reforming within microchannel reactor. The catalysts were characterized by N-2 adsorption-desorption, X-ray diffraction and temperature programmed desorption of NH3. It was found that the catalytic activity was strongly dependent on the catalyst composition. The overall DME reforming rate was maximized over the catalyst with ZnO/(ZnO + Al2O3) molar ratio of 0.4, and the highest H-2 space time yield was 315 mol h(-1).kg(cat)(-1) at 460 degrees C. A bi-functional mechanism involving catalytic active site coupling has been proposed to account for the phenomena observed. An optimized bi-functional DME reforming catalyst should accommodate the acid sites and methanol steam reforming sites with a proper balance to promote DME steam reforming, whereas all undesired reactions should be impeded without sacrificing activity. This work suggests that an appropriate catalyst composition is mandatory for preparing good-performance and inexpensive ZnO-Al2O3 catalysts for the sustainable conversion of DME into H-2-rich reformate. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: METAL-OXIDE CATALYSTS ;  CU-BASED SPINEL ;  METHANOL DECOMPOSITION ;  COMPOSITE CATALYSTS ;  ALUMINA ;  COPPER ;  PRECIPITATION ;  HYDROLYSIS ;  STABILITY ;  MECHANISM
语种: 英语
WOS记录号: WOS:000305040400028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143022
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, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Yang, Mei,Men, Yong,Li, Shulian,et al. Hydrogen production by steam reforming of dimethyl ether over ZnO-Al2O3 bi-functional catalyst[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2012,37(10):8360-8369.
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