The substantial emissions of volatile organic compounds(VOCs)can lead to environmental pollution and health hazards.Catalytic combustion is an efficient method to degrade VOCs.As a catalyst for cyclohexane catalytic combustion,MnCe-Al2O3 spherical pellets were synthesized using the alginate sol-gel method.The results show that adding Ce to Mn catalysts enhances MnOx dispersion and lowers the catalyst's reduction temperature in H2-TPR.The catalyst with a 3∶1 Mn/Ce molar ratio calcined at 650℃showed the highest activity in cyclohexane combustion,thereby achieving complete conversion at 345℃.After 24 h,the catalyst maintained a nearly 100%cyclohexane con-version rate,indicating high stability.The MnCe-31-Al2O3-650 catalyst showed higher activity than those prepared by the impregnation method.
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