International Journal of Plasma Environmental Science & Technology
A novel pulsed corona discharge reactor is described which utilizes surface-plasma along insulating surfaces. The electrodes are comprised of a stainless steel wire anode of 150 µm diameter stretched along the surface of a glass sheet and two parallel aluminum strips as cathodes. An eight-stage Marx bank, which provides 60 ns, 40-45 kV monopolar pulses, was used to produce the surface streamers in nitrogen-oxygen mixtures at atmospheric pressure. With increasing oxygen content, the energy efficiency for NO2 and O3 synthesis was found to increase. The energy efficiency is almost the same for the surface-plasma and volume-plasma. However, the surface-plasma was found to be significantly more energy efficient than the volume-plasma for conversion of dilute NO in a feed gas containing 0-15% oxygen and with the balance being nitrogen. It is explained on the basis of surface-mediated reactions, the electric wind effect, and the diffusivity of the plasma which covers a larger fraction of the volume of the discharge gap as compared to volume-plasma. The surface-plasma reactor will be used to explore the treatment of NOx and hydrocarbons in diesel engine exhaust.
Original Publication Citation
Malik, M.A., & Schoenbach, K.H. (2011). A novel pulsed corona discharge reactor based on surface streamers for NO conversion from N2-O2 mixture gases. International Journal of Plasma Environmental Science & Technology, 5(1), 50-57.
Malik, M. A. and Schoenbach, Karl H., "A Novel Pulsed Corona Discharge Reactor Based on Surface Streamers for NO Conversion from N2-O2 Mixture Gases" (2011). Bioelectrics Publications. 36.