Preferential oxidation of CO in H2 over Co3O4-CeO2 catalysts
Co3O4-CeO2 catalysts prepared by the co-precipitation method have been studied for the preferential oxidation of carbon monoxide in hydrogen. Effects of the cobalt contents and calcination temperature on Co3O4-CeO2 were investigated, and the Co3O4-CeO2 catalyst containing 80 wt.% Co3O4 calcined at 350°C exhibited the highest activity and good selectivity. The influence of the components of the feeding gas (H2, CO2 and H2O) on the preferential oxidation of carbon monoxide had also been tested. The tested results showed that the negative effect of H2 was much weaker than that of H2O and CO2.
KeywordsPreferential oxidation Co3O4 CeO2 CO
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