平行板双介质阻挡放电等离子体处理氮氧化物影响因素

Influencing factors for removal of nitrogen oxides by dielectric barrier discharge reactor

通过自行设计的双介质阻挡反应器产生的等离子体对氮氧化物去除过程进行了研究。考察峰值电压为14-21 kV,NO的初始质量分数为400-600μg/g,O2的体积分数为0-8%,气体流量在600-1 600 mL/min,等离子产生方式,即O2单独经过等离子体,O2与N2共同经过等离子体,O2、N2和NO共同经过等离子体对氮氧化物去除的影响。结果表明：提高峰值电压有利于氮氧化物脱除,增加氧的体积分数和气体流速,抑制了氮氧化物的脱除。

An experimental setup of flat dielectric barrier discharge reactors is designed to remove NOxthrough generating plasma. The influences of the gas flow rate（ 600- 1 600 mL /min）,NOxinitial concentration（ 400- 600ppm）,applied voltage（ 14- 21 kV） and contents of O2（ 0-8%） on the NOxremoval rate are investigated. The NOx removal rate is high at small gas flow rate or low NOxinitial concentration. By increasing the concentration of gas flow rate or NOxinitial concentration,the NOxremoval rate decreases remarkably. Moreover,the removal rate will increase with increasing the discharge voltage. The existence of O2can lead to the decrease of the NOxremoval rate.