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题名: Kinetics of selective oxidation of dimethyl ether to formaldehyde over Al2O3-supported VOx and MoOx catalysts
作者: Huang, XM;  Li, YG;  Xu, YD;  Shen, WJ
关键词: dimethyl ether ;  selective oxidation ;  formaldehyde ;  kinetics ;  supported VOx and MoOx catalysts
刊名: CATALYSIS LETTERS
发表日期: 2004-09-01
卷: 97, 期:3-4, 页:185-190
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The kinetic behaviors of dimethyl ether(DME) selective oxidation to formaldehyde were investigated over Al2O3-supported VOx and MoOx catalysts. It was showed that the reaction is pseudo-zero order with respect to both dimethyl ether and oxygen molecule, suggesting that the reaction of surface intermediate CH3O* is likely to be the rate-determining step. The apparent activation energies for the target reaction were determined to be 122 kJ/mol over the VOx/Al2O3 catalyst and 125 kJ/mol over the MoOx/Al2O3 catalyst, respectively. With the decrease of contact time, the dimethyl ether conversion decreased linearly, while the selectivity of HCHO increased, indicating that formaldehyde is the preliminary product of the selective oxidation of dimethyl ether.
关键词[WOS]: SUPPORTED MOOX ;  DEHYDROGENATION ;  DISPERSION ;  METHANOL ;  DOMAINS ;  ALKENES
语种: 英语
WOS记录号: WOS:000223403000013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139530
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

Recommended Citation:
Huang, XM,Li, YG,Xu, YD,et al. Kinetics of selective oxidation of dimethyl ether to formaldehyde over Al2O3-supported VOx and MoOx catalysts[J]. CATALYSIS LETTERS,2004,97(3-4):185-190.
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