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研究报告

廖建波,卜龙利,张钰彩,王晓晖,张浩,刘海楠.微波辐照下碳化硅与沸石负载氧化铜催化剂协同去除甲苯的实验研究[J].环境科学学报,2011,31(11):2416-2422

Synergistic effect of SiC and CuO/zeolite catalyst on the removal of toluene under microwave irradiation

基金项目：陕西省自然科学基础研究基金(No. 2009JM7001); 陕西省教育厅省级重点实验室重点科研计划项目(No. 2010JS027); 西安建筑科技大学基础研究基金(No. JC0809)

摘要：实验采用浸渍法制备沸石负载氧化铜催化剂,对催化剂的表面形貌进行了表征分析,考察了催化剂在微波场中的升温曲线和对甲苯的吸附能力.催化剂与吸波材料碳化硅混合后装入石英管内组成固定床反应器,考察了微波辐照下碳化硅与催化剂协同氧化甲苯废气的降解效果.研究表明,氧化铜在沸石表面分布比较均匀;催化剂对甲苯的吸附为单层吸附,吸附量为11 mg·g^-1;微波场中催化剂与碳化硅混合体升温迅速,1 min内温度可升至460 ℃.给定实验条件下碳化硅与催化剂协同去除甲苯效果显著,甲苯去除率达94%;连续运行10 h证明催化剂效果稳定;经济性分析表明微波辅助催化氧化甲苯废气工艺能耗低于传统的电阻炉工艺,有一定的应用前景.

Abstract：Zeolite-supported copper oxide (CuO/zeolite) catalyst was prepared by conventional impregnation method, and the surface morphology was observed by scanning electron microscopy. Adsorption capacity of the catalyst to toluene and the temperature-rising curve in the field of microwave were also examined in this study. CuO/zeolite catalyst was mixed with silicon carbide (SiC), one of the excellent microwave-absorbing materials, to treat synergistically toluene waste gas by microwave through a fixed bed reactor. The results showed that copper oxide was dispersed uniformly onto the surface of zeolite, and the adsorption of the catalyst to toluene was monolayer with the amount of 11 mg·g^-1. The temperature rise quickly and reaches 460 ℃ in one minute for CuO/zeolite catalyst and SiC mixture under microwave irradiation. Toluene was degraded effectively by CuO/zeolite catalyst and SiC, and the removal efficiency reached 94% under given parameters. The activity of the catalyst was stable after 10 hours run. Energy consumption of the process of microwave-assisted catalytic oxidation was less than conventional catalytic oxidation process with resistance furnace heating, which shows a promising future for this new process.