Kinetics of ozone and nitric oxides in dielectric barrier discharges in O-2/NOx and N-2/O-2/NOx mixtures

Concentrations of NO, NO2, NO3, N2O5, and O-3 were measured by classical ab sorption spectroscopy in dielectric barrier discharges in flowing O-2/NOx a nd N-2/O-2/NOx mixtures. The results of measurements in different parts of the discharge chamber and in its exhaust are compared to a numerical zero-d imensional kinetic model and good agreement is found. The experimentally fo und upper limit of the NOx concentration allowing ozone production is confi rmed by the kinetic calculations for both gas mixtures. The rotational temp erature of different nitrogen bands was measured by high-resolution emissio n spectroscopy. The results are explained on the basis of a simplified mode l and related to the gas temperature in the microdischarge channel and the surrounding gas.