A combined plasma photolysis (CPP) reactor was used to study the effect of UV irradiation on the removal efficiency and byproducts of toluene decomposition. The influence of UV irradiation length on the removal rate and byproducts were compared. The results show that the toluene removal is obviously improved in the CPP reactor. The removal rate is enhanced with the increase of the UV irradiation length. The increase of removal efficiency is 7.94% and 19.1% under the UV irradiation with 5 cm and 15 cm length, respectively. UV also reduces the production of ozone significantly. It is interesting to find that the effect of UV on the carbon balance is not always increased as expected, but is related to the inlet toluene initial concentration. When the inlet toluene concentration is 300 ppm or 400 ppm, the carbon balance is enhanced by UV. When the inlet concentration is lower, in 60 ppm and 100 ppm, UV no longer plays a positive role. However, UV can change the trend of carbon balance at low initial concentrations and makes it positively related to specific input energy (SIE), which is contrary to the cases without UV.

中文翻译：

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用组合等离子体光解 (CPP) 反应器分解甲苯：紫外线照射和副产物分析的影响

联合等离子体光解 (CPP) 反应器用于研究紫外线照射对甲苯分解的去除效率和副产物的影响。比较了紫外线照射长度对去除率和副产物的影响。结果表明，CPP反应器的甲苯去除率明显提高。去除率随着紫外线照射长度的增加而提高。在5 cm和15 cm长度的UV照射下，去除效率分别提高了7.94%和19.1%。紫外线还可以显着减少臭氧的产生。有趣的是发现紫外线对碳平衡的影响并不总是如预期的那样增加，而是与入口甲苯初始浓度有关。当入口甲苯浓度为 300 ppm 或 400 ppm 时，UV 增强了碳平衡。当入口浓度较低时，在 60 ppm 和 100 ppm 时，UV 不再发挥积极作用。然而，紫外线可以在低初始浓度下改变碳平衡的趋势，并使其与比输入能量（SIE）呈正相关，这与没有紫外线的情况相反。