*2.3. Combustion Kinetic Model*

The NSPD generated kinetic effects (neutral radicals, active particles, excited species) and thermal effects were used to study the effect on flame speed in a CHEMKIN combustion model. The CH4/H2/Air combustion kinetic model was created with an expanded version of the combustion mechanism, incorporating thermodynamics and transport data. The mechanism was updated from GRI-Mech v3.08 with ozone reactions [25] and updated hydrogen combustion mechanism including the excited species O(1D), OH(2+), O2(a1g) [26]. A sub-model of the excited species OH\* and CH\* has also been added [27]. Furthermore, the reaction mechanism of ions and excited species of CH4/Air mixture was also considered [28].
