介质阻挡放电降解VOCs的能效特性研究

Study on Energy Efficiency of Dielectric Barrier Discharge for Degradation of VOCs

挥发性有机物(VOCs)已经严重威胁了城市居民的生活环境,介质阻挡放电技术最高可使VOCs的降解率达到95%以上。本研究选择甲苯作为目标污染物,进行介质阻挡放电(DBD)降解VOCs的能效研究。考察放电电压、电源频率、气体流量和初始浓度对能量密度(SED)和能量效率的影响。研究结果表明:能量效率随放电电压的升高而降低,随电源频率的升高而升高。且能量效率随气体流量的增大先升高后降低,随甲苯初始浓度的增大而提高。

Volatile organic compounds(VOCs)have seriously threatened the living environment of urban residents.Dielectric barrier discharge(DBD)technology has the advantage of good treatment efficiency,with a maximum degradation rate of over 95%for VOCs.In this study,toluene was selected as the target pollutant to study the energy efficiency of dielectric barrier discharge(DBD)degradation of VOCs.The effects of discharge pressure,power frequency,gas flow rate,and initial concentration on energy density(SED)and energy efficiency were investigated.The results show that energy efficiency decreases with increasing voltage and increases with increasing power supply frequency.The energy efficiency increases first and then decreases with the increase of gas flow rate,and increases with the increase of initial toluene concentration.