CATALYTIC-HYDROGENATION OF CARBON-DIOXIDE INTO C-2(-MO() ALCOHOLS WITH IR)SIO2/

The hydrogenation of CO2 was investigated with SiO2-supported Ir-Mo bi metallic catalysts. The C-2(+) alcohols (ethanol, 1-propanol and 1-but anol) were found to be formed by the synergistic action of Ir and Mo. The CO2 conversion was dependent upon metal impregnation procedures an d Mo/Ir molar ratios, but the selectivity to C-2(+) alcohols was almos t constant regardless of these factors. Iridium-Mo/SiO2 catalysts exhi bited the highest CO2 conversion and yield of C-2(+) alcohols at a Mo/ Ir ratio of about 0.3. The results obtained in this work are similar t o those in the CO hydrogenation with Ir-Mo/SiO2 catalysts. As a result , it is suggested that the active species of Mo/SiO2 catalysts might b e the same both in the CO2 hydrogenation and in the CO hydrogenation.