【摘要】 挥发性有机物（VOCs）的大量排放会导致环境污染和健康危害，催化燃烧是高效降解VOCs的重要手段之一．采用海藻酸盐溶胶-凝胶法合成了MnCe-Al₂O₃球形颗粒作为环己烷催化燃烧催化剂，结果表明，Mn催化剂中适当添加Ce可提高Mn O_x的分散性，降低催化剂H₂-TPR还原温度．催化剂中Mn和Ce摩尔比为3∶1、煅烧温度650℃时，催化剂催化燃烧环己烷活性最高，可以在345℃实现环己烷的完全转化．反应24 h后，催化剂仍显示出几乎100%的环己烷转化率，表现了良好的催化稳定性．与浸渍法制备的催化剂相比，MnCe-31-Al₂O₃-650催化剂活性更高．更多还原

【Abstract】 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,Mn Ce-Al₂O₃ spherical pellets were synthesized using the alginate sol-gel method.The results show that adding Ce to Mn catalysts enhances MnO_x 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 conversion rate,indicating high stability.The Mn Ce-31-Al₂O₃-650 catalyst showed higher activity than those prepared by the impregnation method.更多还原