低温等离子体去除空气中NO_2技术的研究

Research on Removing NO_2 from the Air by Non-thermal Plasma

用针—板电极实验研究了影响脉冲放电等离子体去除NO2效率的主要因素:正脉冲电压的去除效率远高 于负脉冲;脉冲峰值电压越高效率越高;随着NO2初始质量浓度的增加,去除效率呈现为先增后减的非单调曲线。 还首次研究了磁场对NO2去除效率的影响及其规律,实验表明磁场能有效提高NO2的去除效率。

NO2 in the air can directly hazard people's health and form acid rain. In order to resolve this problem, non-thermal plasma technology is used to remove NO2 from the air. The factors that affect the removal efficiency, such as the magnitude and the polarity of the pulsed voltage, the initial concentration of NO2, are experimentally investigated. The removal efficiency of positive pulse voltage is far higher than that of negative pulse voltage while other factors are same; the higher the peak-voltage is the higher removal efficiency will be with the increasing initial concentration of NO2 the removal efficiency will change as a non-monotonic curve which increases first and then decreases. It is novel that the magnetic field is applied to decompose NO2 from domestic air in this paper, and it can be concluded experimentally that the removal efficiency is improved significantly by applying magnetic field.