Table 4. The Refined 4-Step Global Mechanism of Methane Combustion²⁶.

no.	reactions	rate equations [kmol/(m3 T s)]	A	b	E
1	CH4 + 0.5O2 → CO + 2H2	d[CH4]/dt = ATbe–E/(RT)·[CH4]0.5[O2]1.25	4.4 × 1011	0	1.26 × 108
2	CH4 + H2O → CO + 3H2	d[CH4]/dt = ATbe–E/(RT)·[CH4][H2O]	3.0 × 108	0	1.26 × 108
3	H2 + 0.5O2 ↔ H2O	d[H2]/dt = ATbe–E/(RT)·[H2][O2]0.5 (forward)	5.69 × 1011	0	1.465 × 108
4	CO + H2O ↔ CO2 + H2	d[CO]/dt = ATbe–E/(RT)·[CO][H2O] (forward)	2.75 × 109	0	8.36 × 107