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题名: Study Mo/HZSM-5 Catalysts by NMR
作者: Liu Wei1;  Xu Yide1;  Li Liyun2;  Hu Hongbing2
关键词: Al-27 and Si-29 MAS-NMR ;  Dealuminum ;  Mo/HZSM-5 ;  Al-2(MoO4)(3) ;  Methane activation
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1997
DOI: 10.3866/PKU.WHXB19970804
卷: 13, 期:8, 页:693-699
收录类别: 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: By using high-resolution solid state Nuclear Magnetic Resonance spectrometer with Al-27 and Si-29 probes, the interaction between Mo species and HZSM-5 of Mo/HZSM-5 catalysts has been studied. The results show that there is a strong interaction between Mo species and HZSM-5 zeolite. The framework aluminium in the zeolite can be easily extracted by the introduction of Mo species. The extract ability of framework aluminium by Mo species increases with increasing Mo loading and the calcination temperature. The extraction process leads to the formation of non-framework Al at first and then a new crystalline phase of Al-2(MoO4)(3). The catalyst, therefore, lost its catalytic activity for methane dehydrogenation and aromatization in the absence of oxygen. The MAS NMR results give us an evidence that Al-2(MoO4)(3) crystallites are much less active for the reaction.
语种: 英语
WOS记录号: WOS:000207601800004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142822
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
2.Chinese Acad Sci, Wuhan Inst Phys, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China

Recommended Citation:
Liu Wei,Xu Yide,Li Liyun,et al. Study Mo/HZSM-5 Catalysts by NMR[J]. ACTA PHYSICO-CHIMICA SINICA,1997,13(8):693-699.
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