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The synergic effect between Mo species and acid sites in Mo/HMCM-22 catalysts for methane aromatization
Ma, D; Zhu, QJ; Wu, ZL; Zhou, DH; Shu, YY; Xin, Q; Xu, YD; Bao, XH; Ma D(马丁); Bao XH(包信和); Ma D(马丁); Bao XH(包信和)
刊名PHYSICAL CHEMISTRY CHEMICAL PHYSICS
2005
DOI10.1039/b502794b
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
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
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.
语种英语
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WOS记录号WOS:000230931200016
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/93089
专题中国科学院大连化学物理研究所
通讯作者Ma D(马丁); Bao XH(包信和); Ma D(马丁); Bao XH(包信和)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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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.
APA Ma, D.,Zhu, QJ.,Wu, ZL.,Zhou, DH.,Shu, YY.,...&包信和.(2005).The synergic effect between Mo species and acid sites in Mo/HMCM-22 catalysts for methane aromatization.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,7(16),3102-3109.
MLA Ma, D,et al."The synergic effect between Mo species and acid sites in Mo/HMCM-22 catalysts for methane aromatization".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 7.16(2005):3102-3109.
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