Analysis of the Change Feature and Action Mechanism of Coal Pore Structure under the Action of Supercritical CO₂

Table 3

Pore parameters of anthracite before and after ScCO₂ treatment in the MIP test.

Pore size	Before treatment			After treatment
	Vg (ml/g)	Sb (m^2/g)	(%)	Vg (ml/g)	Sb (m^2/g)	(%)
Macropores	0.0019	0.001	3.555	0.0203	0.005	6.991
Mesopores	0.0014	0.019		0.0010	0.023
Small pores	0.0074	1.420		0.0057	1.185
Micropores	0.0072	3.937		0.0051	2.660

Note: V_g: pore volume; S_b: pore specific surface area; : total porosity.