Decomposition of toluene in a gliding arc discharge plasma reactor
Decomposition of toluene in a gliding arc discharge plasma reactor
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DOI：
10.1088/0963-0252/16/4/014
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发表时间：
2007-11-01
影响因子：
3.8
通讯作者：
Cheron, Bruno
中科院分区：
文献类型：
--
作者：
Du, Chang Ming;Yan, Jian Hua;Cheron, Bruno
对滑动弧光放电中甲苯的分解进行了研究。实验结果表明，胶凝剂技术能够有效地降解甲苯分子，作为一种替代工具应用于挥发性有机化合物的降解具有广阔的前景。结果表明，电极材料的变化对甲苯的去除效果影响不大。甲苯的脱除效率随着进气温度的升高而提高。混合气体中的水蒸气对等离子体中甲苯的分解有良好的影响。在相对湿度为50%，比输入能量为0.26kWhm(-3)的条件下，能量效率为29.46g(kWh(-1))，高于其他类型的非热等离子体。氧含量过高或过少都不利于甲苯的分解。红外光谱分析表明，甲苯在空气参与下分解生成的主要气相产物为CO、CO2、H2O和NO2。电极表面有棕色沉淀物，经GC-MS分析，为甲苯与自由基反应生成的苯甲醛、苯甲酸、奎宁、硝基苯酚等极性含氧、含氮化合物。提出并总结了GLYDARC技术破坏甲苯的可能机理。
The decomposition of toluene in a gliding arc discharge (glidarc) was performed and studied. Experimental results indicate that the glidarc technology can effectively decompose toluene molecules and has bright prospects of being applied as an alternative tool to decompose volatile organic compounds. It is found that a change in the electrode material had an insignificant effect on the toluene removal efficiency. The toluene removal efficiency increases with increasing inlet gas temperature. The water vapor present in the gas mixture has a favorable effect on the toluene decomposition in the plasma. The energy efficiency is 29.46 g (kWh(-1)) at a relative humidity of 50% and a specific energy input of 0.26 kWh m(-3), which is higher than other types of non-thermal plasmas. Too much or too little oxygen content does not favor toluene decomposition. The major gas phase products detected by FT-IR from the decomposition of toluene with air participation were CO, CO2, H2O and NO2. Some brown depositions were found on the surface of the electrodes, which were polar oxygenous and nitrogenous compounds determined by the GC-MS analysis, such as benzaldehyde, benzoic acid, quinine and nitrophenol from the reaction of toluene with radicals. A possible mechanism for toluene destruction via glidarc technology is proposed and summarized.