Performance of Helical and Straight-wire Corona Electrodes for NOx Abatement under AC/Pulse Energizations
Anusuya Bhattacharyya and B. S. Rajanikanth
Department of Electrical Engineering, Indian Institute of Science, India
Abstract- Non thermal plasma generated by electrical discharges is a promising alternative technology for the treatment of NOx in the diesel engine exhaust. In this paper, the helical electrode, used commonly in electrostatic precipitator, has been tested in a cylindrical dielectric barrier discharge reactor, and its performance has been compared with the conventional straight wire electrode in a plasma reactor of similar dimensions, for low input energies. The reactors have been energized with a solid state pulse source, a power frequency AC source and a compact high frequency AC source. The performance of the helical electrode along with the 50 Hz AC source was found to be more significant when compared to that with the other energizations for NOx treatment.
Keywords- NOx removal, diesel exhaust, non-thermal plasma, dielectric barrier discharge, helical electrode