双介质NTP反应器性能试验及空气放电产生NO_x的机理分析

Performance Test of Double-Dielectric NTP Reactor and Mechanism Analysis on the Generation of NO_x in Air Discharge

为研究双介质阻挡放电型低温等离子体反应器的性能,对自行设计的双介质阻挡放电型低温等离子体反应器进行静态试验,分析了不同空气流量和工作电压对放电区域温度、NO、NO_2体积分数的影响,采集了不同空气流量和工作电压时放电区域的光谱信息,探讨了低温等离子体化学反应机理。研究结果表明:相同空气流量时,放电区域温度及光谱强度均随工作电压增大而增大,NO体积分数随工作电压呈线性增长关系,NO_2体积分数在空气流量为2L/min和4L/min时随工作电压增大而增大,在6L/min、8L/min和10L/min时几乎保持不变。相同工作电压时,放电区域温度随空气流量增大而减小,光谱强度几乎不随空气流量的改变而改变,NO体积分数随空气流量增大而减小,NO_2体积分数先随空气流量增大而减小,当空气流量大于6L/min后趋于稳定。

A static test of self-designed dual-dielectric NTP reactor was conducted to research its performance. The effects of air flow and working voltage on the temperature of discharge region and the volume fractions of NO and NO2 were analyzed. Spectral information of the discharge region under different air flows and working voltages was collected, and the reaction mechanism of NTP reactor was also discussed. The results show that under the same air flow, the temperature and spectral intensity of the discharge region increases with the working voltage, and the volume fraction of NO rises in linearly with the working voltage. When the air flow is 2 L/min or 4 L/min, the volume fraction of NO2 increases with the working voltage, but when the air flow is 6 L/min, 8 L/rain or 10 L/min, the volume fraction of NO2 almost remains unchanged. Under the same working voltage, the temperature of the discharge region decreases with the increase of the air flow, and the spectral intensity hardly changes with the air flow. The volume fractions of NO and NO2 decrease with the increase of the air flow, but the volume fraction of NO2 tends to be stable when the air flow is greater than 6 L/min.