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题名: Effect of variations in pore structure and acidity of alkali treated ZSM-5 on the isomerization performance
作者: Song, Yue-Qin;  Feng, Yan-Long;  Liu, Feng;  Kang, Cheng-Lin;  Zhou, Xiao-Long1;  Xu, Long-Ya2;  Yu, Guo-Xian3
关键词: Alkali treatment ;  Hydro-isomerization ;  Acidity ;  Mesopore ;  Pt/ZSM-5
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2009-09-01
DOI: 10.1016/j.molcata.2009.06.006
卷: 310, 期:1-2, 页:130-137
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: A series of alkali treated ZSM-5 samples were prepared and the effects of the alkali treatment conditions on the n-hexane isomerization performance of Pt/ZSM-5 were investigated. The characterization by XRD, N(2)-adsorption, XRF, NH(3)-TPD, Py-IR and NMR revealed that alkali treatment conditions had the effects on the crystallinity, textural property, Si/Al ratio and acidity of ZSM-5. Mild alkali treatment led to the reduction of the strong acid sites and did not distinctly change the pore structure, whereas severe alkali treatment resulted in the creation of the stronger acid sites and new mesopores. The correlation of the acidity and pore structure and isomerization behavior was established. It was proposed that the conversion of n-hexane was dependent on the amount of strong acid sites and irrelevant to the properties of acid sites and the pore structure. However, the selectivity for iso-hexanes was irrelevant to both the acidity and pore structure. The relative amount of dimethylbutanes (DMB) and methylpentanes (MP) in isomers was related not only to the pore structure, but to the acidity of ZSM-5. The suitable alkali treatment condition facilitated the high yield of isomers and the formation of more DMB. (C) 2009 Elsevier B.V. All rights reserved.
关键词[WOS]: DIFFERENT ALUMINUM CONTENT ;  N-HEXANE ISOMERIZATION ;  HIGH-SILICA ZEOLITES ;  SKELETAL ISOMERIZATION ;  HYDROISOMERIZATION ;  CATALYSTS ;  MESOPOROSITY ;  DESILICATION ;  DISSOLUTION ;  SELECTIVITY
语种: 英语
WOS记录号: WOS:000269426900016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141321
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.E China Univ Sci & Technol, Res Inst Petr Proc, Petr Proc Res Ctr, Shanghai 200237, Peoples R China
2.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
3.Jianghan Univ, Sch Chem & Environm Engn, Wuhan 430056, Hubei, Peoples R China

Recommended Citation:
Song, Yue-Qin,Feng, Yan-Long,Liu, Feng,et al. Effect of variations in pore structure and acidity of alkali treated ZSM-5 on the isomerization performance[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2009,310(1-2):130-137.
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