Characterization of Permeability Changes in Coal of High Rank during the CH₄-CO₂ Replacement Process

Table 2

Testing results of isothermal adsorption experiments about CO₂ and CH₄.

Specimens	Adsorption constants of CO2		Adsorption constants of CH4		Density (kg/m^3)	Matrix elastic modulus (GPa)	Testing temperature (K)
	VL(m^3/t)	PL/MPa	VL(m^3/t)	PL/MPa
Sihe	16.81	0.78	12.12	1.53	1462	5.209	298.15
Tunliu	16.08	1.32	5.47	2.86	1436	5.612	298.15