空心微球氧化铝负载Pt-In催化异丁烷脱氢研究  

Study on isobutane dehydrogenation catalyzed by Pt-In supported on hollow microsphere alumina

作　　者：王佳萌 刘凡吉 宋珍 韩明迅 张希庆 李响响 张立红[1] WANG Jiameng#;LIU Fanji#;SONG Zhen;HAN Mingxun;ZHANG Xiqing;LI Xiangxiang;ZHANG Lihong∗(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350

出　　处：《化学工业与工程》2022年第4期30-38,共9页Chemical Industry and Engineering

基　　金：国家自然科学基金(21776214)。

摘　　要：针对异丁烷脱氢催化剂存在容易烧结与积碳的问题,开发了采用水热法制备的2种不同形貌的Al_(2)O_(3)载体,将其负载Pt-In获得的催化剂用于异丁烷脱氢反应中,研究其对异丁烷脱氢催化行为的影响。借助XRD、SEM、TEM、NH_(3)-TPD、XPS、TG-DTA及低温N_(2)吸-脱附法对催化剂进行物化性能研究。结果表明:由纳米片构建的多孔空心微球氧化铝负载Pt-In催化剂具有较小的Pt纳米粒子、低的比表面积、强的Pt-In相互作用、高的In^(3+)/In^(0)比例且缺少强酸位,从而获得优异的异丁烷脱氢性能,其异丁烯选择性和产率高达93.5%和40.3%,同时异丁烷转化率可稳定在43.0%,反应后的金属颗粒无聚集烧结现象,表现出优异的抗烧结和积碳性能。In view of the problems of easy sintering and carbon deposition in isobutane dehydrogenation catalyst,two kinds of different alumina supports prepared by hydrothermal method were developed,which were used as the support of Pt-In catalysts for isobutane dehydrogenation.The effects of the catalytic behavior on the dehydrogenation of isobutane were studied.The physicochemical properties of the catalysts were investigated by XRD,SEM,TEM,NH_(3)-TPD,XPS,TG-DTA and low temperature N_(2)adsorptiondesorption.The results show that the porous hollow microsphere alumina-supported Pt-In catalyst constructed from nanosheets has smaller Pt nanoparticles,low surface area,strong Pt-In interaction,high In^(3+)/In^(0)ratio and lack of strong acid sites,thereby achieving excellent isobutane dehydrogenation performance,the selectivity and yield of isobutene are as high as 93.5%and 40.3%,and the isobutane conversion can be stabilized at 43.0%.And the metal particles after reaction have no agglomeration and sintering phenomenon,showing excellent sintering and carbon deposition resistance.

关 键 词：异丁烷脱氢 氧化铝 Pt-In催化剂 抗烧结 抗积碳 

分 类 号：TQ133.1[化学工程—无机化工]