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利用低温等离子体处理挥发性有机化合物(VOCs)废气是目前国内外研究的热点。研究利用脉冲调制介质阻挡放电和催化联用技术降解甲苯,对比分析了连续放电和脉冲调制对去除甲苯的影响;研究了脉冲调制后在有无催化剂的情况下的能量效率,比较了两种情况下的臭氧浓度以及中间产物的不同。结果表明:脉冲调制有效提高了甲苯的降解能效,其能量效率几乎是连续放电时的2倍～3倍;在有催化剂的情况下,能量效率是没催化剂的1.5倍～2倍,臭氧浓度明显降低,结焦产物中含苯环的衍生物的量少于无催化的结焦产物。
The use of low temperature plasma treatment of volatile organic compounds (VOCs) exhaust gas is currently a hot spot at home and abroad. In this paper, the pulsed-modulated dielectric barrier discharge and catalytic technology are used to degrade toluene. The effects of continuous discharge and pulsed modulation on the removal of toluene are compared. The energy efficiency after pulse modulation with or without catalyst is studied. Under the ozone concentration and the different intermediate products. The results show that the pulse modulation can effectively improve the energy efficiency of toluene degradation, and its energy efficiency is almost 2 to 3 times that of continuous discharge. In the case of catalyst, the energy efficiency is 1.5 times to 2 times that of no catalyst, and the ozone concentration is obvious Lower, the amount of benzene ring-containing derivatives in the coke product is less than the non-catalyzed coke product.