摘要
以X、Y、USY、丝光沸石、5A和ZSM-5等不同分子筛为载体,在其表面生长了CuAl-LDH层状氢氧化物,浸渍Cs后焙烧,制备一系列具有CuAl-LDO二维层状氧化物的Cs/CuAl-LDO@分子筛催化剂。利用XRD、N_(2)吸附-脱附、SEM、NH_(3)-TPD和CO_(2)-TPD等表征催化剂的结构和相貌,评价催化剂对甲苯侧链甲醇烷基化的反应性能。结果表明,不同分子筛为载体催化剂的相貌、酸碱中心和甲苯侧链烷基化反应性能均有一定差别,其中X分子筛为载体的Cs/CuAl-LDO@X催化剂对甲苯侧链烷基化反应具有最好的催化性能,在甲苯转化率为4.14%时,苯乙烯选择性为51.10%,侧链烷基化选择性达91.79%。
A series of Cs/CuAl-LDO@zeolite catalysts were prepared by using X,Y,USY,mordenite,5A and ZSM-5 zeolites as supports.The CuAl-LDH were grown on the surfaces of the zeolites,and then impregnated with Cs and calcined.The structure and appearance of the catalysts were characterized by XRD,N_(2) adsorption-desorption,SEM,NH_(3)-TPD and CO_(2)-TPD,and the catalytic performance of the catalysts for the side-chain alkylation of toluene with methanol was evaluated.The results showed that the appearance,specific surface area,acid-base sites and the performance of the side-chain alkylation of toluene over different zeolite-supported catalysts are different to some extent.The Cs/CuAl-LDO@X catalyst supported by X-zeolite had the best catalytic performance.When toluene conversion is 4.14%,the styrene selectivity is 51.10%,and the total selectivity of styrene and ethylbenzene is 91.79%.
作者
冉真真
邵欣昕
刘浩东
杜晓倩
侯珊
季生福
Ran Zhenzhen;Shao Xinxin;Liu Haodong;Du Xiaoqian;Hou Shan;Ji Shengfu(State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《工业催化》
CAS
2023年第1期34-40,共7页
Industrial Catalysis
基金
国家自然科学基金资助项目(22072003,21872004)。
