Highly dispersed nickel boosts catalysis by Cu/SiO_(2) in the hydrogenation of CO_(2)-derived ethylene carbonate to methanol and ethylene glycol

作     者：Youwei Yang Jingyu Zhang Yueqi Gao Busha Assaba Fayisa Antai Li Shouying Huang Jing Lv Yue Wang Xinbin Ma Youwei Yang;Jingyu Zhang;Yueqi Gao;Busha Assaba Fayisa;Antai Li;Shouying Huang;Jing Lv;Yue Wang;Xinbin Ma

作者机构：Key Laboratory for Green Chemical Technology of Ministry of EducationCollaborative Innovation Center of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityFuzhou 350207China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第3期

页      面：77-85页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the supports from the National Natural Science Foundation of China(22022811,U21B2096 and 21938008) the National Key Research&Development Program of China(2018YFB0605803) 

主　　题：Cu-based catalyst Ethylene carbonate Methanol Hydrogenation Carbon dioxide 

摘      要：The efficient hydrogenation of CO_(2)-derived ethylene carbonate(EC)to yield methanol(MeOH)and ethylene glycol(EG)is a key process for indirect conversion of CO_(2)to ***,a high H_(2)/EC molar ratio during the hydrogenation process(usually as 180-300)is generally required to achieve good catalytic performance,resulting in high cost and energy consumption for H_(2)circulation in the promising industrial ***,we prepared a series of Ni-modified Cu/SiO_(2)catalysts and explored the effects of synthesis methods and Ni contents on catalytic performance under different H_(2)/EC molar *** Cu/SiO_(2)catalyst with 0.2%(mass)Ni loading prepared by co-ammonia evaporation method exhibited above 99%conversion of EC,91%and 98%selectivity to MeOH and EG respectively at H_(2)/EC ratio of *** no significant deactivation was observed within 140 h at a lower H_(2)/EC of *** is demonstrated that a few of Ni addition could not only promote Cu dispersion and increase surface Cu^(+) species due to the strong interaction between Cu and Ni species,but also form uniformly-dispersed CuNi alloy species and thus enhance the adsorption and dissociation of H_(2).But the excess Ni species would aggregate and segregate to cover partial surface of Cu nanoparticles,leading to a significantly drop of catalytic performance in EC *** insights may provide guidance for further design of catalysts for the ester hydrogenation reactions.