Methanol synthesis by CO2 hydrogenation over titanium modified γ-Al2O3 supported copper catalysts

A titanium-modified gamma -Al2O3 supported copper catalyst has been prepared and used for methanol synthesis by CO, hydrogenation. The addition of Ti to the CuO/gamma -Al2O3 catalyst enhances the activity in CO2 hydrogenation greatly and makes the copper in the catalyst exist in much smaller crystallites. The effect of contact time on the relative selectivity (kappa =S-CH3OH/S-CO) and selectivity of methanol was also investigated. The results indicated that methanol was formed directly from the hydrogenation of CO2.