Preparation of manganese oxide-ferric oxide-supported nano-gold catalyst and using the same

摘要

This present invention provides the preparation of a manganese oxide-ferric oxide-supported nano-gold catalyst and a process for subjecting carbon monoxide and oxygen to interaction resulting in the formation of carbon dioxide in a hydrogen-rich environment by a manganese oxide-ferric oxide-supported nano-gold catalyst to remove carbon monoxide in hydrogen stream. The size of the nano-gold particle is less than 5 nm and supported on mixed oxides MnO₂/Fe₂O₃ in various molar ratios. Preferential oxidation of CO in the presence of CO, O₂ and H₂ by the manganese oxide-ferric oxide-supported nano-gold catalyst is carried out in a fixed-bed reactor in the process of the present invention. The O₂/CO molar ratio is in the range of 0.5 to 4. The manganese oxide-ferric oxide-supported nano-gold catalyst of the present invention is applied to reduce CO concentration in hydrogen steam to less than 100 ppm to prevent CO from contaminating the electrodes of a fuel cell.