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题名: Transient kinetics of methane dehydrogenation and aromatisation: experiments and modelling
作者: Schuurman, Y;  Decamp, T;  Pantazidis, A;  Xu, YD;  Mirodatos, C;  Froment, GF;  Waught, KC
刊名: DYNAMICS OF SURFACES AND REACTION KINETICS IN HETEROGENEOUS CATALYSIS
发表日期: 1997
卷: 109, 页:351-360
收录类别: ISTP ;  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: Isotopic transient experiments combined with in situ DRIFT spectroscopy and TAP experiments were used to study the methane dehydrogenation and aromatisation over a Mo/HZSM-5 catalyst. The stoichiometric reduction of both external and internal molybdenum oxide into carbide-like species was clearly observed in the early stage of the reaction. The active sites for the catalytic dimerization of methane into ethylene are in very low concentration and could be internal carbide-like clusters in tight interaction with the zeolite. The methane molecules are also strongly interacting with most of the OH groups in the zeolite via a reversible activation process leading to the OH/OD exchange. However this activation process is not directly related to the aromatisation process. A large reservoir of benzene precursors is also present in the zeolite, also strongly interacting with the OH groups. Benzene appears as a secondary product formed from ethylene. The aromatisation steps could occur directly on the acid sites of the zeolite, available after the initial reduction and clustering of the Mo ions.
关键词[WOS]: CATALYSTS ;  ACTIVATION ;  BENZENE ;  AROMATIZATION ;  MO/HZSM-5 ;  CONVERSION ;  OXIDANTS ;  ZEOLITE ;  ETHANE ;  OXYGEN
语种: 英语
WOS记录号: WOS:000071440800027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142794
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.Inst Rech Catalyse, CNRS, F-69626 Villeurbanne, France
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Schuurman, Y,Decamp, T,Pantazidis, A,et al. Transient kinetics of methane dehydrogenation and aromatisation: experiments and modelling[J]. DYNAMICS OF SURFACES AND REACTION KINETICS IN HETEROGENEOUS CATALYSIS,1997,109:351-360.
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