Investigation on the Dielectric Properties of CO₂ and CO₂-Based Gases Based on the Boltzmann Equation Analysis

In this paper, the dielectric properties of CO₂, CO₂/air, CO₂/O₂, CO₂/N₂, CO₂/CF₄, CO₂/CH₄, CO₂/He, CO₂/H₂, CO₂/NH₃ and CO₂/CO were investigated based on the Boltzmann equation analysis, in which the reduced critical electric field strength (E/N)_cr of the gases was derived from the calculated electron energy distribution function (EEDF) by solving the Boltzmann transport equation. In this work, it should be noted that the fundamental data were carefully selected by the published experimental results and calculations to ensure the validity of the calculation. The results indicate that if He, H₂, N₂ and CH₄, in which there are high ionization coefficients or a lack of attachment reactions, are added into CO₂, the dielectric properties will decrease. On the other hand, air, O₂, NH₃ and CF₄ (ranked in terms of (E/N)_cr value in increasing order) have the potential to improve the dielectric property of CO₂ at room temperature.