Development of palm-sized gas treatment device utilizing streamer discharges generated by compact resonant high-voltage pulse generator

Abstract

A compact and lightweight gas treatment system integrated with a high-voltage pulse generator driven by SiC-MOSFET and wires-to-wires electrode. The maximum amplitude and pulse width of the output voltage of the pulse generator without load are 10 kV and 31 ns, respectively, and the maximum energy transfer efficiency reaches 88% with a load resistance of 0.44 kΩ. This pulse generator was applied to multilayered wires-to-wires electrodes, and the streamer discharges propagated between the electrodes were observed. Streamers initially propagate horizontally according to the Laplacian electric field near the high-voltage electrode. When they approach the ground electrodes, they curve and propagate toward the ground electrode due to the high electric field between the streamer head and the ground electrode. The velocity of the streamer propagation is with a velocity of 0.4 to 0.71 × 106 m s−1. Ozone production and ethylene removal characteristics are investigated in a sealed vessel. The result shows a high ethylene removal efficiency and high safety by suppressing the ozone concentration in the exhaust gas with a catalyst.