Abstract:

Non-thermal plasma technology is one of the most important gaseous organic pollutant treatment technologies.A new non-thermal plasma technology（corona discharge radical shower technology）was used to study benzene decomposition with the following results.Benzene was readily decomposed with the radical shower technology.The decomposition products were CO2 mainly，but a small amount of CO was generated.Increasing energy density and relative humidity of additional gas could improve the CO2/COx ratio and the extent of decomposition.With 21 W·h·m-3 energy density and 80% relative humidity of additional gas，the CO2/COx ratio and COx generation rate could reach 84.6% and 78.5%, respectively.The benzene decomposition process involved electron dissociation reaction，radical reaction and ion reformation reaction.Moreover，radical reaction was the most important.

Key words:

非热平衡等离子体, 自由基簇射, 苯, 降解

摘要：

非热平衡等离子体技术是目前最重要的气态有机污染物治理技术之一，应用一种新型的非热平衡等离子体技术——电晕放电自由基簇射技术对苯的降解过程进行了深入的实验研究和机理分析，得到了以下的研究结果：自由基簇射技术对苯具有良好的降解效果，苯的降解产物主要是CO2，也有少量CO产生。能量密度和电极气湿度的增加能够提高CO2/COx的比率和苯的降解程度，在能量密度为21 W·h·m-3和电极气相对湿度为80％的条件下，CO2/COx的比率可达84.6％，COx的生成率达到78.5％。自由基簇射苯的降解过程主要涉及电子碰撞反应、自由基反应和离子重组反应，其中自由基反应最为重要。

关键词:

非热平衡等离子体, 自由基簇射, 苯, 降解