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题名: In situ solid state NMR observation of the methanol-to-hydrocarbons (MTH) process over nanosized and microsized HZSM-5 zeolites
作者: Yan, ZM;  Ma, D;  Zhuang, JQ;  Liu, XC;  Liu, XM;  Han, XW;  Bao, XH
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2002
DOI: 10.1039/b201897g
卷: 4, 期:18, 页:4602-4607
收录类别: SCI
文章类型: Article
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 formation of surface alkoxy species on nanosized HZSM-5 and microsized HZSM-5, after exposure to methanol and subsequent conversion to olefins, has been investigated by in situ solid state NMR. Compared to microsized HZSM-5 zeolite, the nanosized HZSM-5 zeolite was found to exhibit a higher affinity for trapping methanol species. Activation of the adsorbed methanol species resulted in the formation of various surface alkoxy species with different rigid characters, including the carboxylate-like surface species, as evidenced by deconvolution of the related spectra. The present results support the existence of the so-called carbon-pool in the conversion of methanol, which serves as the reaction precursor not only for the coupling of the species to form olefins, but also for uncontrolled polymerization to give coke on the surface. The nanosized HZSM-5 shows a distinct resistance to the formation of carbonaceous deposits on the surface.
关键词[WOS]: BRONSTED ACID SITES ;  ANGLE-SPINNING NMR ;  NUCLEAR-MAGNETIC-RESONANCE ;  MOLECULAR-SIEVE CATALYSTS ;  C-13 MAS NMR ;  CRYSTAL SIZE ;  AB-INITIO ;  REACTION-MECHANISM ;  OLEFIN CATALYSIS ;  SILICA-ALUMINAS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000177864000045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84883
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:
Yan, ZM,Ma, D,Zhuang, JQ,et al. In situ solid state NMR observation of the methanol-to-hydrocarbons (MTH) process over nanosized and microsized HZSM-5 zeolites[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2002,4(18):4602-4607.
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