%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