Experimental Study of Ozone Generation by Negative Corona Discharge in Mixtures of N2 and O2

Abstract

Ozone generation by negative DC corona discharge in N2-O2 mixtures has been experimentally investigated using a coaxial wire-cylinder corona reactor operating at room temperature and atmospheric pressure. The experiments have been carried out under different gas flows (15 cm3 min−1 to 200 cm3 min−1) and gas compositions (5% to 90% of O2), and the effect of these parameters on the corona current, the ozone density and the efficiency of the ozone generator have been analyzed. The global rate coefficients for ozone formation and destruction have also been evaluated, and their values compared with those reported by other authors. The maximum efficiency for ozone production was found in gas mixtures with oxygen content about 70–80%.