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题名: Mechanistic study of selective oxidation of dimethyl ether to formaldehyde over alumina-supported molybdenum oxide catalyst
作者: Huang, XM;  Liu, JL;  Chen, JL;  Xu, YD;  Shen, WJ
通讯作者: 申文杰
关键词: dimethyl ether ;  formaldehyde ;  XPS ;  IR ;  MoO3/gamma-Al(2)O3
刊名: CATALYSIS LETTERS
发表日期: 2006-04-01
DOI: 10.1007/s10562-006-0019-9
卷: 108, 期:1-2, 页:79-86
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
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: XPS and IR spectroscopies were used to investigate the surface intermediates of dimethyl ether (DME) oxidation to formaldehyde over MoOx/Al2O3 catalyst. The reaction performances were tested by employing three typical reaction conditions, depending on the O-2/DME ratio and the reaction temperature. When there was sufficient oxygen present in the reaction media, a terminal or bridged CH3O* species formed by DME dissociation was highly active and rapidly reacted with lattice oxygen to produce formaldehyde, leading to higher selectivity of HCHO. When oxygen was consumed completely or only DME was present in the reaction media, CH3O species bonded to more than two Mo atoms (mu-OCH3) and CHx (x=1-3) species attached to the Mo atoms were observed and the relative ratio of (mu-OCH3) /Mo-CHx was significantly dependent on the reduction degree of MoOx domains. The (mu-CH3O) species was related to the formation of CH3OH or COx, and the Mo-CHx species led to the formation of CH4.
关键词[WOS]: METHANOL OXIDATION ;  REDOX PROPERTIES ;  ACTIVE-SITES ;  XPS ;  MOOX ;  SPECTROSCOPY ;  ADSORPTION ;  DISPERSION ;  KINETICS ;  DOMAINS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000236368700014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93769
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.Acad Sinica, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Huang, XM,Liu, JL,Chen, JL,et al. Mechanistic study of selective oxidation of dimethyl ether to formaldehyde over alumina-supported molybdenum oxide catalyst[J]. CATALYSIS LETTERS,2006,108(1-2):79-86.
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