Pulsed streamer discharge plasmas, one of the non-thermal plasma have been used to treat exhaust gases. Since a pulse width of applied voltage has a strong influence on the energy efficiency of the removal of pollutants, the development of a short pulse generator is of paramount importance for practical applications. In this work, nano seconds (ns) pulse generator which has 5ns of pulse duration in output pulsed voltage is developed and NO removal experiments using ns pulsed discharge were conducted. The experimental results of the NO removal showed 100 % of NO removal ratio at 7 pps of pulse repetition rate and the extremely high energy efficiency, 0.43 mol/kWh (12.9 g-NO/kWh) for NO removal (initial NO concentration = 200 ppm, gas flow = 2.0 L/min). The result of deriving energy efficiency for NO removal indicated that the ns pulsed discharge has great advantage in energy efficiency for NO removal to the conventional discharge methods. By this research, the utility of the ns pulse plasma process was proven and the influence of shorter pulse duration on NO removal energy efficiency was confirmed.
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