Operation of a Three-Electrode Reactor With Different Electrode Bias Potential Configurations

J. L. GALLEGO; F. MINOTTI; D. GRONDONA

IEEE TRANSACTIONS ON PLASMA SCIENCE

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2017 vol. 45 p. 54 - 59

0093-3813

The three-electrode plasma reactor for the treatmentof polluted gases combines a dielectric-barrier dischargewith a remote third electrode, designed to enhance streamerpropagation in a relatively large region. In this paper, experimental studies of the electrical magnitudes of the discharge fordifferent electrode bias voltage configurations are presented. Also,the Laplacian electric field distribution in the interelectrode gapis calculated for each configuration. The degradation efficiency ofNO in an N2 atmosphere for the different configurations is alsoreported. It is found that the discharge is generated only for thatelectrode bias configuration for which the external electric fieldpromotes the streamer propagation across the electrode gap. Also,for a triggered discharge, the reactor efficiency for the removalof NO changes with the different electrode bias configurations.This result can be explained in terms of the electric field intensity.The configuration with higher external electric field improves thenumber of streamers propagating in the interelectrode gap so thatmore reactive species generated in the streamers are effectivelyentrained in the gas flow to be treated.