Toluene removal characteristics by a superimposed wire-plate dielectric barrier discharge plasma reactor

摘要

A superimposed wire-plate dielectric barrier discharge reactor was used to remove toluene in this study. The effects of oxygen content, gas flow rate, gas initial concentration and with/without catalyst on toluene decomposition were investigated. It was found that an optimal toluene removal was achieved when the oxygen content was about 5 percent. Under this condition, the highest toluene removal efficiency of 80.8 percent was achieved when the gas concentration was 80 mg/m~3. The toluene removal efficiency decreased with the increase of the gas flow rate and the initial concentration of toluene. In addition, the ozone concentration decreased with the increase of the initial concentration of toluene. It suggested that combining DBD (dielectric barrier discharge) with C0_3O_4/Al_2O_3/foam nickel catalyst in-situ could improve the toluene removal efficiency and suppress ozone formation. Products analysis showed that the main products were CO and CO_2 when oxygen was more than 5 percent.