Silver discharge electrode for suppression of ozone generation in positive dc corona

The aim of this paper is to suppress the ozone production in dc corona discharges, and is to report the effect of material of the discharge electrode on the ozone production. In this study, corona discharges were generated in a coaxial wire-cylinder reactor stressed by positive or negative dc voltage. A set of high purity wires made of different metals, and has constant radii, was tested as discharge electrodes. The reactor was fed by either dry air or oxygen flowing with a constant rate at atmospheric conditions. In the positive dc corona discharge, the ozone production was affected by material of the discharge electrode, and silver was effective to suppress the ozone production in dry air up to about 1/10 compare with that using tungsten electrode.