Study of vibrational kinetics of CO₂ and CO in CO₂–O₂ plasmas under non-equilibrium conditions

This work explores the effect of O2 addition on CO2 dissociation and vibrational kinetics CO under various non-equilibrium plasma conditions. A self-consistent model, previously validated for pure discharges, is further extended by adding CO, including electron impact excitation de-excitation (e-V), vibration-to-translation relaxation (V-T) vibration-to-vibration energy exchange (V-V) processes. The considered include levels up to v = 10 v1=2 v2=v3=5, respectively symmetric stretch, bending asymmetric stretch modes CO2, accounts e-V, V-T in collisions between molecules O atoms V-V processes involving all possible transfers molecules. kinetic scheme comparing model predictions with recent experimental data measured a DC glow discharge, operating at pressures range 0.4 - 5 Torr (53.33 666.66 Pa). results show lower temperature different decreased fraction when added but an increase CO. On one hand, simulations suggest that former result stronger energy-transfer which leads modes; other back reactions contribute increased content mixture.