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题名: In-situ regeneration mechanisms of hybrid catalysts in the one-step synthesis of dimethyl ether from syngas
作者: Luan, Youshun;  Xu, Hengyong;  Yu, Chunying;  Li, Wenzhao;  Hou, Shoufu
通讯作者: 徐恒泳
关键词: dimethyl ether ;  sintering deactivation ;  regeneration ;  reversible regeneration ;  irreversible regeneration
刊名: CATALYSIS LETTERS
发表日期: 2007-05-01
DOI: 10.1007/s10562-007-9066-0
卷: 115, 期:1-2, 页:23-26
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 801
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: One-step synthesis of dimethyl ether (DME) from H-2/CO has been studied in a fixed bed reactor over hybrid catalyst CuOZnOAl2O3/gamma-Al2O3-HZSM-5. The physicochemical properties of fresh and used catalysts were also studied by means of H-2-TPR, XRD and N2O chemisorptions. The results showed that for deactivated catalysts by sintering, redox cycle was an effective method for in-situ regeneration. There were two different regeneration mechanisms according to various atmospheres: (i) For O-2-syngas cycle, sintered Cu particles were re-dispersed and initial activity was restored mostly. The process was reversible, which was called reversible regeneration; (ii) for N2O (CO2)-syngas cycle, Cu particles could not be re-dispersed and catalytic activity was restored a little due to the regulation of surface state. On the other hand, this process could depress the deactivation velocity and was irreversible, which was called irreversible regeneration.
关键词[WOS]: DME SYNTHESIS ;  METHANOL SYNTHESIS ;  SYNTHESIS GAS ;  DEACTIVATION ;  CU/ZNO/AL2O3 ;  COPPER
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000246178000005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98625
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 116023, Peoples R China

Recommended Citation:
Luan, Youshun,Xu, Hengyong,Yu, Chunying,et al. In-situ regeneration mechanisms of hybrid catalysts in the one-step synthesis of dimethyl ether from syngas[J]. CATALYSIS LETTERS,2007,115(1-2):23-26.
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