Dehydrogenation of isobutane to isobutene over a Pt-Cu bimetallic catalyst in the presence of LaAlO_(3) perovskite  

作　　者：Yanyong Li Meng Ge Jiameng Wang Mengquan Guo Fanji Liu Mingxun Han Yanhong Xu Lihong Zhang 

机构地区：[1]Department of Catalysis Science and Technology,Tianjin Key Laboratory of Applied Catalysis Science&Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China [2]Department of Materials Engineering,Xuzhou College of Industrial Technology,Xuzhou 221140,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第4期203-211,共9页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China(21776214)and State Key Laboratory of Chemical Resource Engineering.

摘　　要：In this study,isobutane dehydrogenation to isobutene reaction was carried out in a series of PtCu bimetallic catalysts prepared by coimpregnation method.The catalysts were characterized by means of several techniques,including XRD,N_(2) adsorptiondesorption,TEM,XPS,H2TPR and TG.The results show that the existence of LaAlO_(3) perovskite can enhance the dispersion and sintering resistance of metal nanoparticles and facilitate the transfer of carbon deposits from active sites to the support.Interestingly,the perovskite nanoparticles can also inhibit the reduction of CuOx and the formation of PtCu alloys,resulting in the suitable interaction between Pt and Cu.The PtCu/LaAlO_(3)/SiO_(2)catalyst exhibits the optimal dehydrogenation performance with an isobutane conversion of 47%and isobutene selectivity of 92%after 310 min reaction,which was ascribed to the unique role of LaAlO_(3) perovskite as well as the appropriate PtCu interaction.

关 键 词：Isobutane dehydrogenation Catalyst Nanoparticles Silica LaAlO_(3)perovskite Pt-Cu interaction 

分 类 号：TQ221.213[化学工程—有机化工] TQ426