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题名: The stability of nanosized HZSM-5 zeolite: a high-resolution solid-state NMR study
作者: Zhang, WP;  Han, XW;  Liu, XM;  Bao, XH
关键词: nanostructured material ;  nanosized HZSM-5 zeolite ;  solid-state NMR ;  thermal stability ;  hydrothermal stability
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2001-12-15
卷: 50, 期:1, 页:13-23
收录类别: SCI
文章类型: Article
部门归属: 5043
项目归属: 502
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 thermal and hydrothermal stabilities of HZSM-5 zeolites with crystal sizes less than 100 nm have been studied by multinuclear solid-state NMR, combined with BET and XRD. As evidenced by Al-27 and Si-29 MAS as well as their corresponding cross-polarization/MAS NMR investigations, the thermal stability of nanosized HZSM-5 is not so good as that of microsized HZSM-5. This is due to two processes concerning dealumination and desilicification involved in the calcination of nanosized HZSM-5, while only the dealumination process is conducted in microsized HZSM-5 under the similar calcination process. The hydrothermal stability of nanosized HZSM-5 is, contrary to what was expected, not so bad as that of the microsized HZSM-5 in the course of steam treatment. The actual resistance of the hydrothermal stability to the crystal size of HZSM-5 can be ascribed to an active reconstruction of zeolitic framework through an effective filling of amorphous Si species into nanosized HZSM-5 during hydrothermal treatment. (C) 2001 Published by Elsevier Science B.V.
关键词[WOS]: CATALYTIC PROPERTIES ;  CRYSTAL SIZE ;  ALUMINUM ;  ZSM-5 ;  DEALUMINATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000172607400002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/91859
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:
Zhang, WP,Han, XW,Liu, XM,et al. The stability of nanosized HZSM-5 zeolite: a high-resolution solid-state NMR study[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2001,50(1):13-23.
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