Preparation of Cu/ZnO/MCM-41 catalyst with double-solvent impregnation method and catalytic performance in methanol synthesis by CO$_{\textbf{2}}$ hydrogenation

doi:10.12066/j.issn.1007-2861.1903

Abstract

Abstract:

Cu/ZnO/MCM-41 catalyst was prepared via a double-solvent impregnation method, and its catalytic performance of CO$_{2}$ hydrogenation to methanol was investigated. The water-ethylene glycol double solvent formed by adding an appropriate amount of ethylene glycol to the metal nitrate aqueous solution in the impregnation process promoted metal ions into the channels of MCM-41 support, resulting in the formation of metal particles with very small size. Metal particles were uniformly embedded in MCM-41 channels. The relatively low reduction temperature indicated highly dispersed active sites with strong interaction between Cu and ZnO. Cu/ZnO/MCM-41 catalysts prepared with the method had stable catalytic performance in hydrogenation of CO$_{2}$ to methanol. By adjusting loading to control the particle size of Cu, the methanol selectivity and yield could reach 64.3% and 32.8 g$\cdot$(kgcat)$^{-1 }\cdot$h$^{-1}$. Therefore the double-solvent impregnation method can effectively limit migration and sintering of active components with optimized particle size, so as to obtain catalysts with highly dispersed active sites and stable catalytic performance.

Key words: double-solvent impregnation method, Cu/ZnO/MCM-41, catalyst, CO$_{2}$ hydrogenation, methano

CLC Number:

O643.3

ZHANG Chen, LIAO Peiyi, SHI Zhibiao, SUN Jian, WANG Hui. Preparation of Cu/ZnO/MCM-41 catalyst with double-solvent impregnation method and catalytic performance in methanol synthesis by CO$_{\textbf{2}}$ hydrogenation[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(1): 109-119.

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URL: https://www.journal.shu.edu.cn/EN/10.12066/j.issn.1007-2861.1903

https://www.journal.shu.edu.cn/EN/Y2019/V25/I1/109

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