DEVELOPMENT OF IN2O3-CONTAINING CATALYSTS FOR THE HYDROGENATION OF CO2 TO METHANOL. PART 1. EFFECT OF THE COMPOSITION OF OXIDE SUPPORT

The In2O3-ZrO2 and In2O3-CeO2 catalysts for the hydrogenation of CO2 into methanol were prepared and studied. The effect of oxide support on the physicochemical and catalytic properties of catalysts (CO2 conversion, selectivity and productivity with respect to methanol) was studied using transmission electron microscopy, X-ray diffraction, temperature-programmed reduction by hydrogen, and temperature-programmed CO2 desorption. It has been shown that these catalysts are active and selective with respect to methanol formation at 220-300 °C and a pressure of 40 atm. However, over time, the In2O3-CeO2 catalyst becomes deactivated, while the In2O3-ZrO2 catalyst shows stable performance for at least 10 h.