An Experimental and Thermodynamic Study for Conversion of CO2 to CO and methane over Cu-K/Al2O3


​Catalytic hydrogenation of CO2 to CO and hydrocarbons is carried out over a wide range of catalysts. Group of VIIIB transition metals proved high conversion and selectively for CO and methane, however, low cost and effective catalysts are preferable especially in large industrial scale. In this work an experimental and thermodynamic analysis was carried out for conversion of CO2 to CO and methane over K-Cu/Al2O3 catalyst. Wet impregnation technique was employed to introduce different loadings of copper on the surface of K/Al2O3. The obtained catalysts were characterized for their crystalline phase, surface area, and morphology and pore size distribution. XRD and EDXS illustrated the presence of both K and Cu where a maximum loading of 1.62 wt% of Cu was achieved on a catalyst surface having 0.46 wt% potassium. BET analysis showed a slit mesoporous surface with average size of 0.255 cm3/g and a total surface area of 114.98 m2/g.