Methanol synthesis from CO_2 hydrogenation over Cu based catalyst supported on zirconia modified γ-Al_2O_3

摘要

The effect of zirconia modification on γ-Al_2O_3 support to the Cu based catalyst was studied. It is found that the catalytic activity and methanol selectivity of the catalyst after Zr addition are both improved. The influences of reaction temperature, space velocity and the molar ratio of H_2:CO_2 on Cu/γ-Al_2O_3 and 12Cu10Zr/γ-Al_2O_3 catalyst were also studied. The results indicate that low temperature, high space velocity and proper molar ratio of H_2/CO_2 are advantageous to methanol synthesis. The XRD and TPR characterization show that the addition of Zr enhances the dispersion of CuO species, which is responsible for the enhanced catalytic performance of Cu based catalyst supported on zirconia modified γ-Al_2O_3 catalyst.