Ozone production in a dielectric barrier discharge in air- and oxygen–methane mixtures. Experiment and modeling

Abstract

The effect of methane on ozone production in a dielectric barrier discharge (DBD) was studied in mixtures of CH4 with synthesized air and oxygen. It was found that addition of CH4 significantly reduced the number density of ozone other conditions being equal. A DBD model was developed that takes into account the spatial structure of microdischarges and the fact that near the electrodes their filaments transform into surface discharges, where most of ozone is produced. In addition, in air and air–CH4 mixtures the successive microdischarges were considered to occur not randomly in space, but at the same positions on the electrodes or moving with the flow occurring in the same volumes. The measured values of ozone number density downstream of the DBD were compared with simulation results, obtained with this novel DBD model. A good agreement between experiment and calculations was observed.

Chemical composition of gaseous products generated by coplanar barrier discharge in air and N2/O2 mixtures

“…Currently, there is increasing interest in the use of CAPP generated by different types of plasma sources, the most commonly used are surface dielectric barrier discharges (SDBDs) of various electrode configurations. The recent applications of SDBD have been, for example, removal of volatile organic compounds from gas streams [8], COVID-19 disinfection using treated air [9], plasma actuators for flow control in aerospace applications [10,11] and ozone generation [12,13]. Also, dielectric barrier discharges have been recently studied for applications using plasma catalysis [14], for application in plasma medicine [15] and for enhanced NO x synthesis [16].…”