双极性脉冲高压无声放电法降解间二甲苯/苯

Decomposition of m-xylene/benzene by silent discharge with bipolar pulse high-voltage.

将双极性脉冲高压和工频交流高压分别引入无声放电反应器,对混合气态污染物间二甲苯/苯进行了降解实验.结果表明,双极性脉冲高压的引入对间二甲苯/苯的降解非常有效,间二甲苯与苯的去除率分别为100%、75.2%.气体成分不同降解特性不同,间二甲苯比苯容易降解.与单一组分相比,混合气体中苯受间二甲苯影响较大,最大降解率由单一组分的85.4%降到75.2%;而间二甲苯受苯的影响不大,降解特性基本不变.双极性脉冲高压供电中的脉冲形成电容对放电能量的注入和降解特性产生影响,当脉冲形成电容为2nF时与反应器匹配较为理想.

Bipolar pulse high voltage and AC high voltage with power frequency were applied into silent discharge reactor, respectively. The experiment to test decomposition of m-xylene and benzene mixed were done based on this reactor. Bipolar pulse high voltage was highly effective for removal of mixed VOCs. Removal rates of m-xylene and benzene were 100% and 75.2%, respectively. Decomposition characteristics of different molecules were distinguishing, as a result, m-xylene was decomposable more easily than benzene. Compared with single-composition gas, benzene in mixed gases was affected by m-xylene, maximum removal rate of which decreased from 85.4% to 75.2% of single component. However, benzene had little effect on m-xylene, decomposition characteristics of which remained basically unchanged. In the process of pulse high voltage supply, pulse electric capacitor had important influence on injection of discharge energy and decomposition characteristics. 2nF of pulse electric capacitor was ideal matching with reactor.