文献类型：期刊文献

英文题名：WO3 microcrystallites: One of the crucial factors controlling the isomerization activity of Pt/WO3-ZrO2

作者：Song, Yueqin[1]; Zhang, Juanjuan[1]; Zhou, Xiaolong[1]; Wang, Jin-An[2]; Xu, Longya[3]; Yu, Guoxian[4]

机构：[1] Petroleum Processing Research Center, East China University of Science and Technology, No 130, Meilong Road, Shanghai 200237, China; [2] Laboratorio de Catálisis y Materiales, ESIQIE, Instituto Politécnico Nacional, Col. Zacatenco, 07738, México, D.F., Mexico; [3] State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China; [4] School of Chemistry and Environment Engineering, Jianghan University, Wuhan, Hubei Province 430056, China

年份：2011

卷号：166

期号：1

起止页码：67

外文期刊名：Catalysis Today

收录：EI(收录号：20112013985982)

语种：英文

外文关键词：Chemical reactors - Tungsten compounds - Fourier transform infrared spectroscopy - Catalyst activity - Zirconia - Hexane - Crystalline materials - Isomers - Platinum

摘要：A series of hydrous zirconia supports were prepared by hydrothermal method and Pt/WO3-ZrO2 catalysts were prepared by impregnation method. The catalytic activity of Pt/WO3-ZrO2 in n-hexane isomerization was evaluated in a fixed-bed reactor. In order to investigate the crystalline structure, acidity, and textural properties, the catalysts were characterized by XRD and Raman spectroscopy, NH3-TPD, FTIR, and N2 adsorption. The results indicated that the crystalline structure of hydrous zirconia support and the state of tungsten oxide species over the catalyst varied obviously with the hydrothermal temperature, while no distinct change in the acidity of the catalyst occurred. The isomerization activity of Pt/WO3-ZrO2 could not well be correlated with the crystalline structure of hydrous zirconia support and the acidity. It was proposed that the presence of considerable microcrystalline WO3 in catalyst was indispensable for achieving high isomerization activity. ? 2010 Elsevier B.V. All rights reserved.