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This work presents the results of theoretical and experimental studies on the effect of air humidity on the kinetics of plasma-chemical processes in a plasma-chemical reactor consisting of 16 volume barrier discharges and an 80 L volume working chamber. The component content of active species both in the discharge gap and in the working chamber was calculated under the conditions of the use of dry (RH = 20%) and wet (RH = 80%) ambient air, a specific discharge power of 1.5 W cm −3 , a temperature of the gas medium in the discharge of 300-500 K and various residence times of the species in the discharge volume. The calculations were performed for the steady-state effective electric field in the discharge gap equal to 20 kV cm −1 . It is found that, in spite of the difference between the rotational temperatures of nitrogen molecules in discharges in dry and wet air (≈400 K and ≈440 K, respectively), the best agreement between the calculations and the experiments for both the RH values is observed for the same calculated temperature of the gas medium in the discharge (≈425 K). In most cases, the calculated concentrations of O 3 , HNO 3 , HNO 2 , N 2 O 5 and NO 3 in the discharge gap and in the working chamber are in fairly good agreement with the respective measured data.

In this proceeding the results of theoretical and experimental studies of the component content of active particles formed in plasma-chemical reactor composed of multiple-cell generator of active particles based on volume barrier discharge, and working chamber are presented. For calculation of the content of uncharged plasma components an approach is proposed which is based on averaging of introduced power over the entire volume. Advantages of such approach consist in absence of fitting parameters, such as dimensions of microdischarges, their surface density, and rate of breakdowns. The calculation and the experiment were accomplished with the use of dry air (20% relative humidity) as plasma generating medium. Concentrations of O 3 , HNO 3 , HNO 2 , N 2 O 5 , and NO 3 were measured experimentally in the discharge volume and working chamber for transient time of the particles on the discharge of 0.3 s and more, and the discharge specific power of 1.5 W/cm 3. It has been determined that the best agreement between the calculation and the experiment occurs at calculated gas medium temperature in the discharge plasma of about 400÷425 K, which corresponds to experimentally measured rotational temperature of nitrogen. In the most cases calculated concentrations of O 3 , HNO 3 , HNO 2 , N 2 O 5 , and NO 3 for barrier discharge and working chamber are in a good agreement with respective measured values.