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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)
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
2005
DOI10.1039/b502794b
Volume7Issue:16Pages:3102-3109
Indexed BySCI
SubtypeArticle
Department5
Funding Project502,503,501
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS Research AreaChemistry ; Physics
WOS KeywordTEMPERATURE-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
AbstractThe 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.
Language英语
URL查看原文
WOS IDWOS:000230931200016
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/93089
Collection中国科学院大连化学物理研究所
Corresponding AuthorMa D(马丁); Bao XH(包信和); Ma D(马丁); Bao XH(包信和)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
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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