为有效控制放电区温度,对自行设计的水冷式低温等离子体反应器进行试验,研究了该NTP (non-thermal plasma)反应器的性能,分析了放电区表面温度为60、90、120和150℃时,工作电压、工作频率和空气流量等因素对放电功率、O3和NO2体积分数的影响,并探讨了等离子化学反应机理.结果表明,反应器的放电功率随工作电压、工作频率和放电区表面温度的升高而增大；空气流量对放电功率的影响较小；当放电区表面温度不同时,O3和NO2体积分数随工作电压和工作频率的变化规律呈现不同趋势；当放电区表面温度不变时,O3和NO2体积分数随空气流量先增大后降低；降低放电区表面温度可以有效提高O3和NO2体积分数.研究结果为进一步研究间接低温等离子体技术降低柴油机排放和再生微粒捕集器提供依据.%To effectively control the surface temperatures of the discharge zone, a water-cooled non-thermal plasma reactor was designed, and he impacts of the operating voltage, frequency and air flow rate on the concentration of the active materials (O3, NO2) were investigated at different surface temperatures of the discharge zone. The chemical reaction mechanism was discussed. The results indicated that the discharge power was increased with the rising of VP-p, frequency and temperature, while the flow rate of air has little influence on it. The concentrations of O3 and NO2 were increased and then decreased as the air flow rate rising, with constant surface temperature of discharge zone. Reducing the surface temperature of the discharge zone can effectively improve the concentrations of O3 and NO2. These results provide a reference for reducing the diesel engine exhaust and regenerating diesel particulate filter in the indirect non-thermal plasma system.
展开▼
