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题名: Enhancement on the hydrothermal stability of ZSM-5 zeolites by the cooperation effect of exchanged lanthanum and phosphoric species
作者: Yang, G;  Zhuang, JQ;  Wang, Y;  Zhou, DH;  Yang, MQ;  Liu, XC;  Han, YW;  Bao, XH
关键词: zeolite ;  hydrothermal stability ;  density functional ;  electrostatic potential ;  cooperation
刊名: JOURNAL OF MOLECULAR STRUCTURE
发表日期: 2005-03-04
DOI: 10.1016/j.molstruc.2004.11.018
卷: 737, 期:2-3, 页:271-276
收录类别: SCI
文章类型: Article
项目归属: 502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: It was explored by density functional calculations that exchanged La or P species exert great influence on the local Al sites as well as on the adjacent exchanged species. In partially exchanged La- or P/H-ZSM-5 zeolite, some of the Al sites will fall off from the zeolite framework even more easily than in H-form ZSM-5, consistent with our XRF experiments. However, when exchanged by both La and P species, Al at either of the two exchanged sites shows better stability compared to H-from. zeolite. La and P species will interact strongly with each other, as evidenced by the charge donation process and the shortening of P-O-1 bond length. It was just the cooperation of La and P species that enabled RSCC catalysts worked normally under severe conditions. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: DENSITY-FUNCTIONAL THEORY ;  CATALYTIC CRACKING ;  ALUMINUM ;  H-ZSM-5
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000227082800025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81737
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:
Yang, G,Zhuang, JQ,Wang, Y,et al. Enhancement on the hydrothermal stability of ZSM-5 zeolites by the cooperation effect of exchanged lanthanum and phosphoric species[J]. JOURNAL OF MOLECULAR STRUCTURE,2005,737(2-3):271-276.
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