Pogulay S. Investigation of plasmachemical processes in volume barrier discharge in N2/O2/H2O mixture at atmospheric pressure.

The results of theoretical and experimental studies of the component content of active neutral particles in a volume barrier discharge as well as in a remote working chamber with volume 80 L of a plasma-chemical reactor in dry air (20% relative humidity) and wet air (80% relative humidity) are presented. Experimental dependencies of O3, HNO3, HNO2, NO3, N2O5 and OH concentrations on specific power in the discharge, gas mixture transient time in the discharge gap (volume purge rate), and air RH are determined in both the barrier discharge volume and the remote chamber. Dependencies of rotational temperatures of nitrogen molecules and OH radicals on specific power in the discharge, air RH, and gas mixture transient time in the discharge are obtained. For the description of plasma-chemical processes in the barrier discharge, a model based on averaging the injected power over the total discharge volume at the constant electric field in the plasma of 20 kV/cm is used. The best agreement of experimental results with calculation is observed at estimated gas mixture temperatures being close to experimentally measured ones for N2 and ОН. In most cases, the calculated values of O3, HNO3, HNO2, NO3, N2O5 concentrations and their dependencies on the system parameters are in a good agreement with experimental data.