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Transient kinetics of methane dehydrogenation and aromatisation: experiments and modelling
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
1997
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
关键词[WOS]CATALYSTS ; ACTIVATION ; BENZENE ; AROMATIZATION ; MO/HZSM-5 ; CONVERSION ; OXIDANTS ; ZEOLITE ; ETHANE ; OXYGEN
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.
语种英语
WOS记录号WOS:000071440800027
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142794
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Schuurman, Y.,Decamp, T.,Pantazidis, A.,Xu, YD.,Mirodatos, C.,...&Waught, KC.(1997).Transient kinetics of methane dehydrogenation and aromatisation: experiments and modelling.DYNAMICS OF SURFACES AND REACTION KINETICS IN HETEROGENEOUS CATALYSIS,109,351-360.
MLA Schuurman, Y,et al."Transient kinetics of methane dehydrogenation and aromatisation: experiments and modelling".DYNAMICS OF SURFACES AND REACTION KINETICS IN HETEROGENEOUS CATALYSIS 109(1997):351-360.
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