介质阻挡放电-催化降解苯的研究

采用双介质阻挡放电管 ,当含苯气体的流量为 1 5L·min- 1 ,放电电压在 60 0 0V—1 2 0 0 0V范围内 ,放电管温度在 2 1 0℃左右 ,研究介质阻挡放电 催化降解苯的协同效应 .结果表明 ,在余辉区中放入催化剂 ,60 0 0V的电压下 ,苯的降解率可达 70 % ,产物中CO/CO2为 0 0 5 ;而在同样电压下 ,不放入催化剂 ,苯的降解率仅为 5 5 %左右 ,CO/CO2 约为 0 5 .由此可见 ,催化剂在余辉区时能与等离子体协同作用 ,促进苯的降解

STUDY ON THE DECOMPOSITION OF BENZENE BY DBD-CATALYSIS

Experiments on the plasma catalytic decomposition of benzene in the air at atmospheric pressure were performed by using a coaxial geometry dielectric barrier discharge(DBD).The decomposition of benzene by DBD catalysis was investigated when the catalysts were put in different discharge areas. The results show that the decomposition of benzene under 6000V was up to 70% when the catalysts were in the afterglow area;while under the same voltage,it was only about 55% without catalysts. And the values of CO/CO 2 in the products were 0 05 and 0 5 for with and without catalysts ,respectively.