The Thermal Decomposition Behavior of Pyrite-Pyrrhotite Mixtures in Nitrogen Atmosphere

Table 2

Calculation results of the apparent activation energy of the three ore dust samples.

Sample type	Function	Mechanism			Ea/kJ·mol^−1	A/s^−1	Model
Pyrite	Inverse Jander equation	Three-dimensional diffusion, 3D		0.9810	147.18	1.49 × 10^5	a
Pyrite	Shrinkage spherical (volume)	Shrinkage spherical		0.9558	89.04	5.6 × 10^1	b
Mixed minerals (1 : 1)	Mampel power rule	Phase boundary reaction (one-dimensional, n = 2)		0.9754	87.20	2.95 × 10^1	c
Pyrrhotite	Third order	Multistage reaction		0.9914	27.21	3.70 × 10^5	d
Pyrrhotite	Jander equation	Three-dimensional diffusion, spherical symmetry, 3D		0.9657	41.59	2.01 × 10^3	e