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题名: The synergic effect between Mo species and acid sites in Mo/HMCM-22 catalysts for methane aromatization
作者: Ma, D;  Zhu, QJ;  Wu, ZL;  Zhou, DH;  Shu, YY;  Xin, Q;  Xu, YD;  Bao, XH
通讯作者: 马丁 ;  包信和
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2005
DOI: 10.1039/b502794b
卷: 7, 期:16, 页:3102-3109
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502,503,501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The acid properties of Mo/HMCM-22 catalyst, which is the precursor form of the working catalyst for methane aromatization reaction, and the synergic effect between Mo species and acid sites were studied and characterized by various characterization techniques. It is concluded that Bronsted and Lewis acidities of HMCM-22 are modified due to the introduction of molybdenum. We suggest a monomer of Mo species is formed by the exchange of Mo species with the Bronsted acid sites. On the other hand, coordinate unsaturated sites (CUS) are suggested to be responsible for the formation of newly detected Lewis acid sites. Computer modelling is established and coupling with experimental results, it is then speculated that the effective activation of methane is properly accomplished on Mo species accommodated in the 12 MR supercages of MCM-22 zeolite whereas the Bronsted acid sites in the same channel system play a key role for the formation of benzene. A much more pronounced volcano-typed reactivity curve of the Mo/HMCM-22 catalysts, as compared with that of the Mo/HZSM-5, with respect to Mo loading is found and this can be well understood due to the unique channel structure of MCM-22 zeolite and synergic effect between Mo species and acid sites.
关键词[WOS]: TEMPERATURE-PROGRAMMED DESORPTION ;  SUPPORTED MOLYBDENUM CATALYSTS ;  DEHYDRO-AROMATIZATION ;  MO/HZSM-5 CATALYSTS ;  HZSM-5 ZEOLITE ;  MAS NMR ;  NONOXIDATIVE CONDITIONS ;  MCM-22 ZEOLITE ;  ZSM-5 ZEOLITE ;  BENZENE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000230931200016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93089
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:
Ma, D,Zhu, QJ,Wu, ZL,et al. The synergic effect between Mo species and acid sites in Mo/HMCM-22 catalysts for methane aromatization[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2005,7(16):3102-3109.
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