Contribution of Ash Content Related to Methane Adsorption Behaviors of Bituminous Coals

Table 2

Adsorption parameters of the D-A model of methane adsorption at 298 K.

D-A model	A1	A2	A3	A4	A5	A6	A7	A8
𝑊0 (mmol/g)	0.45	0.54	0.59	0.70	0.66	0.64	0.52	0.48
𝐸 (KJ/mol)	5.34	4.44	5.92	5.14	6.06	5.22	4.64	5.76
𝑛	1.38	1.31	1.94	1.37	1.63	1.60	1.38	1.68
Mean relative deviation δ (%)	1.62	1.95	1.53	1.09	0.69	0.52	1.33	0.69