Influence of the degree of carbon dioxide conversion on electron transport coefficients*

In this research, the influence of the gas mixture composition appearing as a result of plasma conversion of carbon dioxide on the values ​​of electron transfer coefficients was studied using the Bolsig+ code. The total ionization and attachment frequencies, mobility and diffusion coefficient, and average electron energy are calculated in the reduced electric field range E/N = 1–10000 Td. It is shown that for each of the listed transport coefficients, there are 1-2 values ​​of E/N at which the composition of the gas mixture has little effect on its value. For example, the total ionization frequency at E/N < 570 Td decreases with increasing CO2 conversion, but at E/N > 570 Td, a decrease in the CO2 concentration in the gas mixture facilitates the ionization of molecules by electron impact. At E/N < 27 Td and E/N > 480 Td, the average electron energy in pure CO2 is lower than in partially or fully converted CO₂, but within the range E/N = 27 – 480 Td the situation is the opposite. The results we obtained are necessary for hydrodynamic modeling of processes in gas-discharge plasma in CO₂.