The hydrogenation of carbon dioxide into methanol was studied on promoted CuZn-based catalysts. Combination of either ZrAl and CeAl were used as metal promoters. The combination of metal promoters, the catalyst preparation conditions and the reaction temperature highly affected the yield of methanol on CuZn-based catalysts. ZrAl metal promoters were more effective than CeAl. The higher the reaction temperature the higher was the yield of methanol regardless the catalyst promotion. Improved preparation conditions for Cu/Zn/Zr/Al (50/40/5/5 mol.-%) catalyst resulted in larger surface area leading the catalyst activity close to the thermodynamic equilibrium at 250oC and 50 bar of pressure. Carbon monoxide is also formed due to the reverse water gas shif (RWGS) reaction causing the decrease of methanol selectivity as a function of reaction temperature.

Carbon dioxide hydrogenation into methanol over promoted Cu/Zn-based catalysts

249th National Meeting (2015)

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