**3. Validation of Kinetic Models**

The plasma kinetic model was validated using an experimental study in [29] by comparing the mole fraction of the decay process of O atoms. The plasma kinetic model was validated using an experimental study in [13]. The model accurately predicts the O atom mole fraction, in good agreement with experimental data.

The combustion kinetic model was validated using experiments by Coppens [30], Hermanns [31], the Konnov mechanism [32], and the San Diego mechanism [33]. The combustion kinetic mechanism was tested with H2 and CH4 fractions equal xH2 = 0.05 and xCH4 = 0.95CH4 at different equivalence ratios. Figure 3 shows the validation results for burning velocities of CH4/H2/Air mixture with 5%, 30%, and 40%. H2 content. The model shows good agreement with experimental data compared to other mechanisms, with slightly lower values at rich burning conditions as seen in [30,31].

**Figure 3.** Validation: predicted values of burning velocities of CH4/H2/Air mixture with a H2 content of (**a**) 5%, (**b**) 30% and (**c**) 40%.
