Silver modified Cu/SiO2 catalyst for the hydrogenation of methyl acetate to ethanol  

作　　者：Zhiheng Ren Muhammad Naeem Younis Hui Zhao Chunshan Li Xiangui Yang Erqiang Wang Gongying Wang 

机构地区：[1]Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China [2]National Engineering Laboratory for VOCs Pollution Control Material&Technology,University of Chinese Academy of Sciences,Beijing 101408,China [3]CAS Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,The National Key Laboratory of Clean and Efficient Coking Technology,Beijing Key Laboratory of Ionic Liquids Clean Process,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [4]Zhongke Langfang Institute of Process Engineering,Langfang 065000,China [5]Zhongke Langfang Institute of Process Engineering,Zhengzhou 450000,China [6]School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第6期1612-1622,共11页中国化学工程学报（英文版）

基　　金：Key Research Program of Frontier Sciences,CAS(Grant No.QYZDB-SSW-SLH 022);the National Natural Science Foundation of China-National Research Council of Thailand(NSFC NRCT,51661145012);K.C.Wong Education Foundation(GJTD 2582018-04)。

摘　　要：A series of silver modified Cu/SiO2 catalysts were synthesized with ammonia-evaporation method and applied in vapor-phase hydrogenation of methyl acetate to ethanol.The influence of additive‘Ag’on the structural evolution of catalyst was systematically studied by several characterization techniques,such as N2 adsorption–desorption,N2O titration,PXRD,FTIR,in-situ FTIR,H2-TPR,H2-TPD,XPS and TEM.Results showed that incorporation of a small amount of Ag could enhance the structural stability,and the strong interaction between Cu and Ag species was conducive to increase the dispersion of copper species and create a suitable Cu+/(Cu0+Cu+)ratio,which was proposed to be responsible for the improved catalytic activity.The maximum conversion of MA(94.1%)and selectivity of ethanol(91.3%)over optimized Cu-0.5 Ag/SiO2 and 120 h on stream without deactivation under optimal conditions demonstrates its excellent stability.

关 键 词：Copper SILVER HYDROGENATION Methyl acetate ETHANOL KINETIC 

分 类 号：TQ426[化学工程] TQ223.122