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Effects of impregnation sequence on the microstructure and performances of Cu-Co based catalysts for the synthesis of higher alcohols
Authors:Siyu Deng  Wei Chu  Huiyuan Xu  Limin Shi  Lihong Huang
Institution:Department of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
Abstract:Silica-supported CuCo catalysts were prepared by impregnation method with different impregnation sequence for higher alcohols synthesis. These catalysts were characterized by H2-TPR, XRD, N2 adsorption, XPS techniques and CO selective hydrogenation reaction measurement. The effects of impregnation sequence on the structure and performance of cata-lysts were investigated, and there were important influences on the selectivity to higher alcohols. There was a strong synergistic effect between copper and cobalt for the co-impregnated sample. The CuCo/SiO2 catalyst prepared by co-impregnation showed a better yield of total alcohols, and a higher selectivity to total alcohols which reached 51.5%.
Keywords:copper  cobalt  impregnation sequence  synergistic effect  selective hydrogenation  carbon monoxide
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