%0 Journal Article %A Zhiheng Ren %A Muhammad Naeem Younis %A Hui Zhao %A Chunshan Li %A Xiangui Yang %A Erqiang Wang %A Gongying Wang %T Silver modified Cu/SiO2 catalyst for the hydrogenation of methyl acetate to ethanol %D 2020 %R 10.1016/j.cjche.2020.02.011 %J Chinese Journal of Chemical Engineering %P 1612-1622 %V 28 %N 6 %X 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-situFTIR, 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-0.5Ag/SiO2 and 120 h on stream without deactivation under optimal conditions demonstrates its excellent stability. %U https://cjche.cip.com.cn/EN/10.1016/j.cjche.2020.02.011