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题名: Effect of aluminum on the formation of zeolite MCM-22 and kenyaite
作者: Cheng, MJ;  Tan, DL;  Liu, XM;  Han, XW;  Bao, XH;  Lin, LW
关键词: MCM-22 ;  kenyaite ;  hexamethyleneimide ;  hydrothermal synthesis ;  solid state NMR
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2001-02-01
卷: 42, 期:2-3, 页:307-316
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: The synthesis of zeolite MCM-22 and kenyaite under static hydrothermal conditions using hexamethyleneimide (HMI) as a directing agent was investigated. Kenyaite was the favored product instead of the purr silica analogue of MCM-22 for a pure silica synthesis mixture. With increasing SiO2/Al2O3 ratio, the crystallized products varied from purr MCM-22 to a mixture of MCM-22 and kenyaite, and finally pure layered silicate kenyaite. The fraction of MCM22 crystallites increases, whilst that of kenyaite decreases with the aluminum content. All the products occlude HMI molecules, and the amount of HMI increases with the aluminum content. MCM-22 and kenyaite have different layer structures, but the Si atoms in the HMI-included kenyaite have similar NMR chemical shifts as those in MCM-22. Aluminum atoms, which are present as tetrahedral framework species, are most possibly incorporated into the framework of MCM-22 only. The presence of aluminum seems to be critical for the formation of MCM-22 zeolite. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVE ;  CATALYSTS ;  CRYSTALLIZATION ;  MAGADIITE ;  ANALOG
语种: 英语
WOS记录号: WOS:000166629800015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138853
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:
Cheng, MJ,Tan, DL,Liu, XM,et al. Effect of aluminum on the formation of zeolite MCM-22 and kenyaite[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2001,42(2-3):307-316.
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