Axial propagation of nano-seconds pulsed discharge in coaxial reactor

Non-thermal plasma has been widely used in many applications, such as ozone generation, control of NOx and SOx from exhaust gases, dioxin decomposition, volatile organic compounds (VOCs) removal and laser excitation. Recently, it is demonstrated by our research group that the non-thermal plasma produced using the nano-seconds pulsed discharge has higher energy efficiencies of ozone generation and removal of pollutants in gases. However, the physical characteristics of nano-seconds pulsed streamer discharge is still not clear enough. In this paper, the axial propagations of nano-seconds pulsed discharge in a coaxial reactor were investigated by observing its streak images. In the results, influence of applied voltages and feeding gas composition against nano-seconds pulsed discharge propagation velocity are reported.