Preparation of γ-Al2O3 via Hydrothermal Synthesis Using ρ-Al2O3 as Raw Material for Propane Dehydrogenation  

作　　者：Hongguang Liu Xiaomin Dong Jiping Xia Xiaoyun Li Yanmin Sun Qi Cai 

机构地区：[1]School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300132,China [2]CNOOC Tianjin Chemical Research and Design Institute Co.,Ltd,Tianjin 300131,China

出　　处：《Transactions of Tianjin University》2020年第5期362-372,共11页天津大学学报（英文版）

基　　金：Hebei University of Technology and CNOOC Tianjin Chemical Research and Design Institute Co.,Ltd.

摘　　要：γ-Al2O3 was prepared by hydrothermal synthesis usingρ-Al2O3 and urea as raw materials.In this work,the eff ects of the molar ratio of CO(NH2)2/Al and reaction temperature were investigated,and a Pt–Sn–K/γ-Al2O3 catalyst was prepared.The ammonium aluminum carbonate hydroxide(AACH),γ-Al2O3,and Pt–Sn–K/γ-Al2O3 were characterized by X-ray diff raction,scanning electron microscopy,transmission electron microscopy,N2 adsorption–desorption,thermogravimetry–differential thermal analysis,and NH3 temperature-programmed desorption techniques.The reactivity of Pt–Sn–K/γ-Al2O3 for propane dehydrogenation was tested in a micro-fixed-bed reactor.The results show thatγ-Al2O3 with a specific surface area of 358.1 m 2/g and pore volume of 0.96 cm 3/g was obtained when the molar ratio of CO(NH2)2/Al was 3:1 and the reaction temperature was 140℃.The alumina obtained by calcination of AACH has a higher specific surface area and larger pore volume than the industrial pseudo-boehmite does.The catalyst prepared from AACH as precursor showed high selectivity and conversion,which can reach 96.1%and 37.6%,respectively,for propane dehydrogenation.

关 键 词：Ammonium aluminum carbonate hydroxide Γ-AL2O3 CATALYST Propane dehydrogenation 

分 类 号：TQ426[化学工程]