Bimetallic PtSn nanoparticles confined in hierarchical ZSM-5 for propane dehydrogenation  

作　　者：Tianlei Wang Zhikang Xu Yuanyuan Yue Tinghai Wang Minggui Lin Haibo Zhu 

机构地区：[1]National Engineering Research Center of Chemical Fertilizer Catalyst,School of Chemical Engineering,Fuzhou University,Fuzhou 350002,China [2]Qingyuan Innovation Laboratory,Quanzhou 362801,China [3]State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第1期384-391,共8页中国化学工程学报（英文版）

基　　金：supports of the National Natural Science Foundation of China(21878050,22178062);Foundation of State Key Labora-tory of Coal Conversion(J21-22-620);Green Petrochemical Engineering Base of Intelligence Introduction for Innovation(111 Project D17005)are gratefully acknowledged.

摘　　要：A series of PtSn/hierarchical ZSM-5 catalysts were developed for propane dehydrogenation,in which the PtSn bimetallic particles are confined in the mesopores of hierarchical ZSM-5 zeolite.The synthesis of PtSn/hierarchical ZSM-5 catalysts was achieved via the loading of Pt and Sn species onto the hierarchical ZSM-5 catalysts that are obtained through a desilication of conventional ZSM-5.The PtSn/hierarchical ZSM-5 catalysts were fully characterized by XRD,N_(2) adsorption,STEM,XPS,and CO-IR techniques,which reveals that highly dispersed PtSn bimetallic nanoparticles are enclosed into mesopores of hierarchical ZSM-5.The catalytic performance of PtSn/hierarchical ZSM-5 is greatly affected by the concentrations of alkali solution in the desilication process and Sn/Pt ratios in PtSn bimetallic particles.The PtSn1.00/ZSM-5(0.8)catalyst shows the highest efficiency in propane dehydrogenation,which gives an initial conversion of 46%and selectivity of 98%at 570℃.The high efficiency in these PtSn/hierarchical ZSM-5 catalysts for propane dehydrogenation is mainly ascribed to the confinement of PtSn particles in the mesopores of hierarchical ZSM-5 zeolite.

关 键 词：Hierarchical ZSM-5 Propane dehydrogenation DESILICATION PtSn particles 

分 类 号：TQ221.212[化学工程—有机化工] TQ426