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题名: Hydroisomerization activity and selectivity of n-dodecane over modified Pt/ZSM-22 catalysts
作者: Wang, Gang1, 2;  Liu, Quanjie2;  Su, Weiguang1;  Li, Xiujie1;  Jiang, Zongxuan1;  Fang, Xiangchen2;  Han, Chongren2;  Li, Can1
通讯作者: 李灿
关键词: hydroisomerization ;  n-dodecane ;  ZSM-22 ;  FT-IR ;  NMR
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2008-02-01
DOI: 10.1016/j.apcata.2007.11.002
卷: 335, 期:1, 页:20-27
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The hydroisomerization of n-dodecane was investigated over Pt supported on unmodified ZSM-22 and on modified ZSM-22. The effect of ZSM-22 modification on Pt/ZSM-22 acidity and on catalytic performance is discussed in detail using MAS NMR and FT-IR results. The ZSM-22 was modified by NH4+ ion-exchange, HNO3 or (NH4)(2)SiF6 treatment, and by steam treatment in order to tune the acidity of the catalysts. The unmodified ZSM-22 catalyst shows very low activity in the hydroisomerization of n-dodecane due to the lowest acidity. The conversions of the catalysts for the reaction of n-dodecane are increased from 1.1% to 96.6% at 300 degrees C as the acidity of the ZSM-22 is increased from 0.043 mmol/g to 0.329 mmol/g, but the isomerization selectivity is reduced. The catalyst that was modified by the combination of NH4+ ion-exchange and (NH4)2SiF6 treatment possesses the Bronsted acid sites with medium strength and shows the high isododecane selectivity (88.0%) under high conversion (87.5%) at 300 degrees C. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: ZEOLITE CATALYSTS ;  MOLECULAR-SIEVES ;  PT/SAPO-11 CATALYST ;  ALKANES ;  ISOMERIZATION ;  HEPTANE ;  HYDROCRACKING ;  OCTANE ;  NMR ;  ZSM-22
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000253366100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101319
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 Catalysis, Dalian 116023, Peoples R China
2.SINOPEC, Fushun Res Inst Petr & Petrochem, Fushun 113001, Peoples R China

Recommended Citation:
Wang, Gang,Liu, Quanjie,Su, Weiguang,et al. Hydroisomerization activity and selectivity of n-dodecane over modified Pt/ZSM-22 catalysts[J]. APPLIED CATALYSIS A-GENERAL,2008,335(1):20-27.
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