NOx存在条件下相对湿度对甲苯氧化产物的影响

Effect of relative humidity on oxidation products of toluene in the presence of NOx

利用流动管反应器模拟甲苯与氧化剂·OH在NOx存在条件下的反应,定量测定了不同相对湿度条件下(17.5%、35%、50%、70%)反应生成的部分气相产物和颗粒相产物,计算了不同相中产物产率,测量了不同相对湿度下的颗粒相有机碳(OC)产率,推导了相对湿度对甲苯氧化反应的影响机制.结果表明,相对湿度不仅对甲苯与·OH反应途径比例有影响,还对产物的产率及氧化程度有影响.

A flow tube reactor was used to simulate the reaction of toluene and OH radical in the presence of NOx.The products formed in gas phase and particle phase under different relative humidity conditions(17.5%,35%,50%,70%)were determined.The yields of detected products and organic carbon(OC)in the gas and particle phases were reported.The present study show that the relative humidity not only affects the ratio of the reaction pathway of toluene and⋅OH but also the yield and oxidation degree of the product.