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题名: Effect of silanization on catalytic performance of Pt/SAPO-11 for hydroisomerization of n-dodecane
作者: Wang, ZM;  Tian, ZJ;  Teng, F;  Xu, YP;  Hu, S;  Tan, MW;  Xu, ZS;  Lin, LW
关键词: silanization ;  platinum ;  SAPO-11 zeolite ;  n-dodecane ;  hydroisomerization ;  selectivity
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2005-09-01
卷: 26, 期:9, 页:819-823
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The effect of silanization of SAPO-11 on the hydroisomerization of n-dodecane over Pt/SAPO-11 catalysts was studied. The SAPO-11 support was silanized by the chemical liquid deposition with tetraethoxysilane or tetrachlorosilicane. The Pt/SAPO-11 catalysts were characterized by X-ray diffraction, N-2 adsorption, NH3-temperature-programmed desorption (TPD) and hydrocracking of 2,2,4-trimethylpentane. N-2 adsorption and NH3-TPD results show that the micropore volume and the acidity of the catalysts are reduced after silanization, and the reaction rates of 2,2,4-trimethylpetane hydrocracking over the catalysts are also reduced. This indicates that the acidic sites on the external surface of SAPO-11 are selectively deactivated by silanization. The selectivity for monobranched isomers over Pt/SAPO-11 is enhanced by silanization, which is ascribed to the shrink of pore mouths of SAPO-11 after silanization. Moreover, the total hydroisomerization selectivity decreases after silanization. Due to the shrink of pore mouths of the silanized catalysts, diffusion limitation to branched products might increase, leading to severe hydrocracking reactions in micropores of the catalysts.
关键词[WOS]: ZEOLITE CATALYSTS ;  HYDROCONVERSION ;  SORPTION ;  ALKANES ;  DECANE ;  ACID
语种: 英语
WOS记录号: WOS:000232474800020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139789
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, Lab Nat Gas Utilizat & Appl Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Res Inst Daqing Petrochem Co, Heilongjiang 163714, Peoples R China

Recommended Citation:
Wang, ZM,Tian, ZJ,Teng, F,et al. Effect of silanization on catalytic performance of Pt/SAPO-11 for hydroisomerization of n-dodecane[J]. CHINESE JOURNAL OF CATALYSIS,2005,26(9):819-823.
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