Preparation of MnCe-Al2O3 Spherical Pellets and Their Catalytic Performance in Cyclohexane Combustion
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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