文献类型：会议论文

英文题名：Effect of hydrothermal conditions on isomerization activity of Pt/SO 4 2--ZrO2

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

机构：[1] Petroleum Processing Research Center, East China University of Science and Technology, 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

会议论文集：Advances in New Catalytic Materials

会议日期：August 16, 2009 - August 20, 2009

会议地点：Cancun, Mexico

语种：英文

外文关键词：Acidity - Chemical reactors - Sulfur compounds - Calcination - Hexane - Platinum compounds - Catalyst activity - Crystalline materials - Sulfur - Isomers - Thermoanalysis - Zirconia

摘要：Pt/SO4 2--ZrO2 catalysts (PSZ) were prepared by using a series of hydrous zirconia as support synthesized via a hydrothermal method. The catalytic performances of these catalysts were evaluated in the n-hexane isomerization in a fixed bed reactor. The crystalline structure, acidity, reduction properties, textural texture, and sulfur content were characterized by XRD, NH3-TPD, H2-TPR, N2 adsorption and thermal analysis. The experimental results indicated that the hydrothermal ageing of zirconium hydroxide led to great changes in the crystalline structure of hydrous zirconia support, sulfur content, and the acidity of PSZ. The abundant strong acid sites and high sulfur content were essential but insufficient to achieve a PSZ catalyst with high isomerization activity. Too weak or too strong interaction between sulfur species and zirconia in the catalysts was unfavorable to the isomerization reaction. The presence of considerable sulfate species interacting moderately with zirconia was crucial to high isomerization activity. ? (2010) Trans Tech Publications, Switzerland.