能量注入对放电等离子体去除气相苯系物的影响  

Effects of energy injection on removal of benzene hydrocarbons in the air by discharge plasma

作　　者：魏长宽[1] 李靖[2] 朱天乐[2] 李凤岐[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,青岛266003 [2]北京航空航天大学环境工程系,北京100083

出　　处：《环境工程学报》2008年第2期239-242,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20677004)

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11 kV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。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.

关 键 词：等离子体 苯系物 去除效率 能量效率 

分 类 号：X51[环境科学与工程—环境工程]