Research on removing NO₂ from the air by non-thermal plasma

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.