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题名: Enhancement of catalytic activity over TiO2-modified Al2O3 and ZnO-Cr2O3 composite catalyst for hydrogen production via dimethyl ether steam reforming
作者: Yang, Mei1, 2;  Men, Yong1;  Li, Shulian1;  Chen, Guangwen1
关键词: Dimethyl ether ;  Steam reforming ;  Activity enhancement ;  H-2 production ;  ZnO-Cr2O3 ;  TiO2-Al2O3
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2012-08-08
DOI: 10.1016/j.apcata.2012.04.032
卷: 433, 页:26-34
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The dimethyl ether steam reforming (DOME SR) was carried out over the composite catalyst of ZnO-Cr2O3 coupled with Al2O3, TiO2 or TiO2-Al2O3 in the microreactor.The results showed that the catalytic activities were greatly enhanced over the composite catalyst of ZnO-Cr2O3 combined with TiO2-Al2O3 (ZnCr-TiAl) in comparison to those combined with Al2O3 or TiO2 in DME SR. By evaluating the catalytic activity of solid acids in DME hydrolysis, it was proposed that the better performance of TiO2-Al2O3 in DME hydrolysis contributed to the superior activity of ZnCr-TiAl in DME SR, indicating a higher DME hydrolysis activity favored DME SR. In view of the characterization of N-2 physisorption, scanning electron microscope. Xray diffraction and NH3 temperature-programmed desorption, the promotion effect of TiO2 on both DME hydrolysis and steam reforming was discussed in terms of the modification effect of TiO2 on the acid properties of Al2O3 surface. The acid strength or total acid amount was enhanced by the addition of different TiO2 content. In the 150 h medium stability test, there was no obvious deactivation for ZnCr-TiAl catalyst with the H-2 production rate of 345 mol h(-1) kg(cat)(-1) and the CO selectivity in the dry reformate remained below 6%. The characterization results of the used catalyst revealed that no change in the crystalline phase and size occurred on the spent catalyst. (c) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: METAL-OXIDE CATALYSTS ;  TIO2-ZRO2 MIXED OXIDES ;  METHANOL DECOMPOSITION ;  FUEL-CELLS ;  HYDRODESULFURIZATION ;  SPINEL ;  TIO2 ;  DME ;  DEHYDRATION ;  SUPPORTS
语种: 英语
WOS记录号: WOS:000307321400004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143129
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. Enhancement of catalytic activity over TiO2-modified Al2O3 and ZnO-Cr2O3 composite catalyst for hydrogen production via dimethyl ether steam reforming[J]. APPLIED CATALYSIS A-GENERAL,2012,433:26-34.
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