文献类型：期刊文献

英文题名：Preparation, Characterization, and Isomerization Catalytic Performance of Palladium Loaded Zirconium Hydroxide/Sulfated Zirconia

作者：Ma, Zhiming[1];Meng, Xuan[1];Liu, Naiwang[1];Yang, Chao[1];Shi, Li[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：57

期号：43

起止页码：14377

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20184406008444);WOS:【SCI-EXPANDED(收录号:WOS:000449239500005)】；

基金：This work is sponsored by China Postdoctoral Science Foundation (No. 2017M621389), Shanghai Sailing Program (No. 18YF1406300), and Explore and Research Foundation for Youth Scholars of Ministry of Education of China (No. 222201814011)

语种：英文

外文关键词：Crystal structure - Catalysts - Ammonia - Isomerization - Isomers - Aluminum oxide - Hexane - Palladium compounds - Zirconia - Sulfur compounds - Surface structure

摘要：A series of zirconium hydroxide and sulfated zirconia were prepared by a facile hydrothermal method without a template. The catalysts were characterized by XRD, BET, SEM, TEM, TG-DSC, Raman, NH3 TPD, and pyridine IR spectroscopy, and the reactivity was evaluated by the isomerization of n-hexane. The results indicated that a colloidal network structure could be formed by the condensation of the surface hydroxyl group under hydrothermal atmosphere, and it had an impact on the crystal form, surface properties, crystallization, and thermostability. Based on this, a crystallization model was deduced. The amounts of sulfates decreased with decreasing hydroxyl groups, so the acid distribution and strength have been changed. Ammonia ions and alumina also had an obvious effect on the surface structure and acidity of zirconium hydroxide and sulfated zirconia. Finally, isomerization of n-hexane indicated that a catalyst modified by ammonia hydrothermal treatment and alumina showed better reactivity and stability.