Table 2. Mechanism Model Fitting Results under Pure Oxygen Conditions.

numbering	function name	reaction mechanism	F(α)	f(α)	R1 (first stage)	R2 (second stage)	R3 (third stage)	R4 (fourth stage)
1	Maple one-line rule, first order	stochastic nucleation and subsequent growth	–ln (1 – α)	1 – α	0.9837	0.9807	0.8350	0.9580
2	second order	chemical reaction, deceleration shape α-t curve	(1 – α)−1 – 1	(1 – α)2	0.9644	0.9418	0.8547	0.9504
3	shrinking cylinder(area)	phase boundary reaction (cylindrical symmetry)	1 – (1 – α)0.5	2 × (1 – α)0.5	0.9612	0.9994	0.7878	0.9538
4	2/3 order	chemical reaction	(1 – α)−0.5	2 × (1 – α)1.5	0.9737	0.9586	0.8486	0.9535
5	constricted globose	phase boundary reaction (spherical symmetry)	1–(1−α)1/3	3 × (1 – α)2/3	0.9802	0.9957	0.8121	0.9595