中文摘要：

采用正极性高压直流供电和串齿线放电极——管式接地极构成的放电等离子体反应器，研究了苯系物（苯、甲苯和对二甲苯）去除效率与供电电压之间的关系，以及放电极齿轮数对苯系物去除效率、COx（CO2＋CO）生成量和能量效率的影响。研究结果表明，苯系物的去除效率、COx生成量皆随电压升高而增大。随着电压升高，能量效率先升后降，当电压为11kV左右时，能量效率最高。对应放电齿轮数为31的苯系物去除效率、COx生成量和能量效率皆高于放电齿轮数为55或7，这表明对应特定的等离子体反应器，有一最佳放电齿数匹配。

英文摘要：

The benzene, toluene and p-xylene removal by positive DC streamer discharge were studied in a link tooth wheel-cylinder plasma reactor. The relationship between the removal efficiency and the applied voltage was established. And the effects of the tooth wheel number on the removal efficiency, the COx formation and the energy efficiency were investigated. The results show that benzene, toluene and p-xylene removal and the CO formation increase with the increase of applied voltage while the largest energy efficiency occurs at about 11 kV. The removal efficiency, the COx formation and the energy efficiency corresponding to tooth wheel number of 31 are all higher than those of the tooth wheel number of 55 or 7, which suggests that there exists the most suitable discharge tooth wheel number for a certain plasma reactor.