采用共沉淀法制备SiC改性5% Co-2.5% Ce/Al₂O₃催化剂，研究了不同SiC负载量改性催化剂的吸波升温性能和催化氧化甲苯性能。结果表明，随着SiC负载量的增加，催化剂吸波升温性能逐渐增强。SiC最佳负载量为5%时，催化剂催化氧化甲苯性能最佳，催化剂具有较大的比表面积和适宜的微孔结构。甲苯催化氧化活性评价结果表明，5% Co-2.5% Ce/5% SiC-Al₂O₃催化剂对不同甲苯浓度具有较强适应性，对中低浓度的甲苯降解效果显著。空速低于15 000 h^-1时催化剂能发挥高效催化作用，微波功率在120~385 W有利于甲苯的催化氧化。

SiC modified 5% Co-25% Ce/Al₂O₃ catalyst is prepared via co-precipitation method,and the performances of the catalyst with different SiC loading amount in microwave-absorbing temperature-rising and catalytic oxidation of toluene are studied.The results show that with higher SiC loading amount,the catalyst has a higher wave-absorbing temperature-rising performance.The catalyst with 5% of SiC has a large specific surface area and suitable microporous structure,and presents the best performance in catalyzing oxidation of toluene.The evaluation results show that 5% Co-2.5% Ce/5% SiC-Al₂O₃ catalyst has a strong adaptability to different concentrations of toluene,and has a significant degradation effect on medium and low concentrations of toluene.The catalyst can play an efficient catalytic role when the air velocity is less than 15 000 h^-1.Microwave power at 120 W to 385 W is conducive to the catalytic oxidation of toluene.

李潇祎(1997-),女,硕士研究生,研究方向为大气污染控制工程,18768911395@163.com