Abstract
Different compositions of Co3O4catalysts on CeO2-ZrO2solid solution (Ce0.9Zr0.1O2and Ce0.8Zr0.2O2) have been studied for the oxidation of propylene. The optional amount of Co3O4active phase on CeO2-ZrO2support of 30 wt% was found. The mixed Co3O4-CeO2-ZrO2with the same composition of the optimal supported ones showed approximately the same activity, which was not higher than the activity of the mixed Co3O4-CeO2catalyst. Catalytic activities of mixed Co3O4-CeO2with different loading contents supported on high surface area supports (Al2O3, SiO2) were then measured. The optimal composition of active phase was still 30 wt% but the minimum temperature of the highest activity increased to above 300°C due to the inert nature influence of the support.
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