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题名: An MAS NMR study on the Mo-modified phosphoric rare earth (HZRP-1) penta-sil zeolite catalyst
作者: Shu, YY;  Ma, D;  Liu, XC;  Han, XW;  Xu, YD;  Bao, XH
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2000-08-31
DOI: 10.1021/jp001266v
卷: 104, 期:34, 页:8245-8249
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: High-resolution solid-state MAS NMR, equipped with a newly designed device for conducting catalytic reactions, was used to characterize in-situ an Mo modified phosphoric rare earth-containing penta-sil zeolite catalyst (denoted as Mo /HZRP-1), which showed good activity for methane dehydro-aromatization in the absence of oxygen. Al-27 MAS NMR spectra revealed the presence of different Al-relating species in the calcined and reacted catalysts. High calcination temperature and high Mo loading enhanced the replacement of framework silicon by phosphorus atoms, resulting in the alteration of the environment of aluminum nuclei in the zeolitic framework and leading consequently to a change of the acidic property of the catalyst. In correlation with reaction results of the relevant catalysts, it was concluded that the presence of tetrahedral framework aluminum, which is associated with the formation of Bronsted acidic sites, is of great significance for methane dehydro-aromatization.
关键词[WOS]: SOLID-STATE NMR ;  METHANE DEHYDROGENATION ;  MO/HZSM-5 CATALYSTS ;  TRANSIENT KINETICS ;  CAVERN DESIGN ;  ACID SITES ;  BENZENE ;  AROMATIZATION ;  CONVERSION ;  HZSM-5
语种: 英语
WOS记录号: WOS:000089068300022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138818
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:
Shu, YY,Ma, D,Liu, XC,et al. An MAS NMR study on the Mo-modified phosphoric rare earth (HZRP-1) penta-sil zeolite catalyst[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2000,104(34):8245-8249.
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