화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.36, No.1, 73-82, 2013
Gas-Phase Hydrogenolysis of Glycerol Catalyzed by Cu/MOx Catalysts
The catalytic activities of Cu/MOx (MOx = Al2O3, TiO2, and ZnO) catalysts in the gas-phase hydrogenolysis of glycerol were studied at 180-300 degrees C under 0.1MPa of H-2. Cu/MOx (MOx = Al2O3, TiO2, and ZnO) catalysts were prepared by the incipient wetness impregnation method. After reduction, CuO species were converted to metallic copper (Cu-0). Cu/Al2O3 catalysts with high acidity, high specific surface areas and small metallic copper size favored the formation of 1,2-propanediol with a maximum selectivity of 87.9% at complete conversion of glycerol and a low reaction temperature of 180 degrees C, and favored the formation of ethylene glycol and monohydric alcohols at high reaction temperature of 300 degrees C. Cu/TiO2 and Cu/ZnO catalysts exhibited high catalytic activity toward the formation of hydroxyacetone with a selectivity of approx. 90% in a wide range of reaction temperature.