Research on High Stability Cu/SiO2 Catalyst for Acetophenone Hydrogenation to α-Phenylethanol
The thermal stability of Cu/SiO2 catalysts is poor,and they are prone to deactivation.In order to further improve the defect of poor thermal stability,additives are usually added to adjust the electronic structure of the catalyst to improve its stability.In this paper,three metal materials,Ca,In,and Al,were introduced to modify Cu/SiO2.The results showed that the activity of the Ca-Cu/SiO2 catalyst remained stable after 10 hours of reaction,and the conversion of acetophenone remained at 100%without any deactivation.After reaction for 10 h,the conversion of acetophenone on In-Cu/SiO2 and Al-Cu/SiO2 catalysts only maintained about 20%and 25%,and the modification did not meet the expected goal.Through technical characterization such as N2 adsorption,XRD,H2-TPR,NH3-TPD,and TG,it was further proved that the addition of Ca improved the stability of the catalyst and the interaction between the active component and the support,thereby obtaining a Ca-Cu/SiO2 catalyst for the hydrogenation of acetophenone high conversion,high selectivity,and high stability in the reaction of α-phenylethanol.
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