常州大学学报（自然科学版）2024，Vol.36Issue(2)：85-92,8.DOI:10.3969/j.issn.2095-0411.2024.02.009
Ag/SiC和Ag/Al2O3-SiC催化剂的乙烯环氧化催化性能
Catalytic performances of Ag/SiC and Ag/Al2O3-SiC catalysts for ethylene epoxidation
摘要
Abstract
Highly dispersed Ag/SiC and Al2O3 modified Ag/SiC catalysts were prepared and employed for ethylene epoxidation.The results showed that the conversion of ethylene was significantly im-proved after Al2O3 modification,but the selectivity of ethylene oxide was sharply reduced.Further studies revealed that ethylene was adsorbed on SiC surface in the reaction.After O2 was dissociated on the Ag surface,the active O species spilled over to SiC surface to participate in the epoxidation reac-tion.The Al2O3 modification altered the electronic properties of Ag and inhibited the migration of ac-tive O species on SiC surface,resulting in the change of ethylene epoxidation performances.This work provides some reference for the design of catalysts for ethylene epoxidation.关键词
Ag/SiC催化剂/乙烯环氧化/Al2O3修饰Key words
Ag/SiC catalysts/ethylene epoxidation/Al2O3 modification分类
化学化工引用本文复制引用
李祥,焦志锋,赵吉晓,魏珍妮,刘宇,郭向云..Ag/SiC和Ag/Al2O3-SiC催化剂的乙烯环氧化催化性能[J].常州大学学报（自然科学版）,2024,36(2):85-92,8.基金项目
中国石油-常州大学创新联合体资助项目(2021DQ06). （2021DQ06）
