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利用自行设计的介质阻挡放电型低温等离子体反应器,研究了NO初始浓度、O_2初始浓度、放电功率、电源频率等因素对NTP转化N_2/O_2/NO气氛中NO的影响规律。研究发现,NO去除率随功率增大而升高,到达一最大值后随功率增大而降低;NO去除率随O_2初始浓度增加而降低,随NO初始浓度增大而减小。相同放电功率下,同一组分中NO去除率随电源频率的增加而降低,因此相同放电功率下降低电源频率可提高NO去除率。O_2初始浓度不高于5%时,NO_x大部分为NO,NO_2和O_3浓度均随放电功率增大而降低,NO_2、O_3生成量随O_2初始浓度升高而增多。
The effects of initial concentration of NO, initial concentration of O 2, discharge power, power frequency and other factors on the NO concentration in N 2 / O 2 / NO by NTP were studied by using self-designed dielectric barrier discharge low temperature plasma reactor. The results showed that NO removal rate increased with increasing power, reaching a maximum value and then decreasing with increasing power. NO removal rate decreased with the increase of initial O 2 concentration and decreased with the increase of NO initial concentration. The same discharge power, the same component NO removal rate decreases with the increase of the power frequency, so the same discharge power to reduce the power frequency can increase the NO removal rate. When the initial concentration of O_2 is not higher than 5%, the NO_x is mostly NO, the NO_2 and O_3 concentrations decrease with the increase of discharge power, and the NO_2 and O_3 production increase with the initial concentration of O_2.