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Effects of High Temperature Water Steaming on the Active Centers of ZnHZSM-5
Cheng Mojie; Yang Yashu
关键词Znhzsm-5 Water Steaming Propane Active Centers Dealumination
刊名ACTA PHYSICO-CHIMICA SINICA
1996
DOI10.3866/PKU.WHXB19960810
12期:8页:721-726
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The effects of high temperature water steaming (HTWS) on the structure of HZSM-5 and ZnHZSM-5 catalysts have been investigated using XRD, XPS and IR spectrum of adsorbed pyridine, and the aromatization of propane has been tested as a probe reaction to show the change of catalytic performance. The result indicate that the treatment of HTWS nearly has no significant effect on the crystallinity of zeolite catalysts, but it lead to the dealumination of zeolite framework and the migration of zinc ions departing from the cation positions and results in the enrichment of aluminum and zinc content on the outer surface of zeolite crystallites and the decrease of catalyst acidity, and comparing the variation of Si/Al with Zn/Si and Zn/Al, it is shown that the framework aluminum species with zinc counterions are more difficult to detach from the framework than those with proton counterions. The variation of the reaction activity and selectivity of propane aromatization also verifies that the active centers of B and Zn-L acids are diminished differently depending on the treatment of HTWS processing.
语种英语
WOS记录号WOS:000207600100010
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142776
专题中国科学院大连化学物理研究所
作者单位Acad Sinica, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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Cheng Mojie,Yang Yashu. Effects of High Temperature Water Steaming on the Active Centers of ZnHZSM-5[J]. ACTA PHYSICO-CHIMICA SINICA,1996,12(8):721-726.
APA Cheng Mojie,&Yang Yashu.(1996).Effects of High Temperature Water Steaming on the Active Centers of ZnHZSM-5.ACTA PHYSICO-CHIMICA SINICA,12(8),721-726.
MLA Cheng Mojie,et al."Effects of High Temperature Water Steaming on the Active Centers of ZnHZSM-5".ACTA PHYSICO-CHIMICA SINICA 12.8(1996):721-726.
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