利用溶胶-凝胶法制备的碳化硅基Cu-Mn-CeO_x复合催化剂处理甲苯，并在微波场中分析其性能。结果表明，碳化硅具有良好的吸波性能，负载后的催化剂活性组分紧紧附着在碳化硅载体的表面。针对不同的进气浓度和流量，催化剂在微波场下显示出比常规加热方法更高的催化性能，在280℃就能去除90%以上的甲苯。由催化剂的微观分析表征可以看出，催化剂活性组分以铜锰尖晶石以及立方晶相的二氧化铈为主；催化剂活性单元及有机气体分子在微波场中高频震动，强化了其氧化过程，并减少了催化剂堵塞失活现象，可以大大延长催化剂的使用寿命。

SiC supported Cu-Mn-CeO_x composite catalyst is prepared by sol-gel method and is used to process toluene and its performance is analyzed in the microwave field.The results indicate that silicon carbide has a good wave-absorbing property.The active components of supported catalyst tightly adhere to the surface of silicon carbide carrier.Given different inlet concentration and flow rate of gas,the catalyst shows better catalytic performance in the microwave field compared with that in the conventional heating method,and can remove more than 90% of toluene at 280℃.It can be found from the microscopic analysis of the catalyst that the active components of the catalyst are dominated by Cu-Mn spinel and ceria with cubic crystal phase.The active units of catalyst and organic gas molecules vibrate at high frequency in the microwave field,which intensifies the oxidation process and reduces the phenomena of plugging and inactivation of catalyst,greatly extending the service life of the catalyst.

胡旭睿(1992-),男,硕士研究生,研究方向为大气污染控制,328306101@qq.com