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题名: Studies of mechanism of catalytic action on oxidative dehydrogenation of ethane over NiO
作者: Chen, T;  Li, WZ;  Yu, CY
关键词: NiO ;  nonstoichiometric oxygen ;  oxidative dehydrogenation of ethane ;  mechanism
刊名: ACTA CHIMICA SINICA
发表日期: 1999
卷: 57, 期:9, 页:986-991
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The mechanism of catalytic action on oxidative dehydrogenation of ethane over NiO has been investigated by means of O-2 - TPD, pulse measure, in situ Weiss magnetic methods and TAP(temporal analysis of products) experiments. It is found that the oxidized Ni is maintained in the course of ODHE reaction. The exchange between gas phase oxygen and nonstoichiometric oxygen (alpha ,beta oxygen species) is reversible, and the beta oxygen species (possibly O-),which exists both on the surface and in the bulk of the catalyst, shows higher selectivity towards ethylene than the ar one (possibly O-2(-),O-2(2-)) which just exists on the surface of the catalyst. The mechanism is proposed that the ethylene, which is not only the product but also the intermedium of forming CO2, forms from the reaction of the O- with ethane on the catalysts' surface, and the CO2 forms by the reaction of ethylene and/or C2H5 with O-2(-),O-2(2-) and O-2(,)The catalyst is reoxidized with the help of the reaction between oxygen vacancy, lattice oxygen and oxygen adsorpted.
关键词[WOS]: OXIDE
语种: 英语
WOS记录号: WOS:000082978300007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138587
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:
Chen, T,Li, WZ,Yu, CY. Studies of mechanism of catalytic action on oxidative dehydrogenation of ethane over NiO[J]. ACTA CHIMICA SINICA,1999,57(9):986-991.
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