Cu/ZnO/MOx (MOx=Al2O3, TiO2, and ZrO2) catalysts were prepared by the coprecipitation method. Crystal ZnO and amorphous Al2O3, TiO2, and ZrO2 presented in both calcined and reduced Cu/ZnO/MOx catalysts. After reduction, CuO species were converted to metallic copper (Cu°). The acidities of the Cu/ZnO/MOx catalysts were in an order of Cu/ZnO/Al2O3>Cu/ZnO/ZrO2>Cu/ZnO/TiO2>Cu/ZnO. The catalytic activities of Cu/ZnO/MOx catalysts in the gas phase hydrogenolysis of glycerol were studied at 24-3 ? under .1 MPa of H2. The acid sites of Cu/ZnO/MOx catalysts catalyzed the dehydration of glycerol and the metallic copper catalyzed the hydrogenation reactions. Cu/ZnO/TiO2 catalyst favored the formation of 1,3-propanediol and.
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