Preparation and characterization of CuO-ZnO-TiO_2 catalyst for methanol synthesis from carbon dioxide hydrogenation

The CuO-ZnO-TiO2 catalyst was prepared by parallel-slurry-mixing-precipitation method combined with addition of surfactant and characterized by nitrogen adsorption-desorption,XRD,SEM,EDS and H2-TPR.The results showed that the average pore diameter of the mesoporous CuO-ZnO-TiO2 catalyst was 3.7436 nm,and the dispersion of CuO was good on CuO-ZnO-TiO2 catalyst and the reduction temperature of CuO was low.Under the conditions of reaction temperature of 230℃,reaction pressure of 2.0MPa,space velocity of 2100h-1 and feed gas H2/CO2 molar ratio of 3:1,methanol synthesis from CO2 hydrogenation obtained optimal results,giving a selectivity to methanol of 19.68% and a methanol yield of 2.26%.