介质阻挡等离子体放电与催化联用技术分解苯

Decomposition of benzene by dielectric barrier plasma discharge and catalysis.

采用介质阻挡等离子体放电与催化剂MnO2联用技术对苯去除进行了研究.结果表明,加入MnO2可充分利用O2和产生于介质阻挡等离子放电区的O3,能够增加苯氧化分解为CO2的程度,且苯去除的能量效率是不用催化剂时的2倍.催化剂MnO2离放电区的距离和能量密度对苯去除率有显著影响.当能量密度低于564J/L时,MnO2离放电区的距离越近,苯的去除效果越好;当能量密度高于1051J/L时,苯的去除效果与MnO2离放电区的距离有关并有一个最佳值.阐述了苯在等离子体放电区以及MnO2上的氧化机理.

The benzene removal was studied adopting dielectric barrier plasma discharge and catalyst MnO2 joint technique. MnO2 input could utilize completely O2 and O3 produced in dielectric barrier plasma discharge zone; and increase the degree of benzene oxidation decomposition as CO2. The energy efficiency of benzene removal with MnO2 doubled that of without using catalysts. The distance between catalyst MnO2 bed and plasma discharge zone and the energy density had marked influence on benzene removal rate. When the energy density was lower than 564J/L, the shorter the distance between MnO2 and discharge zone, the better the removal effect of benzene. When the energy density was higher than 1051 J/L, the benzene removal effect was related with the distance between MnO2 and discharge zone and had an optimal value. The oxidation mechanism of benzene in dielectric discharges zone and over MnO2 was discussed in detail.