Microscale Research on Effective Geosequestration of CO₂ in Coal Reservoir: A Natural Analogue Study in Haishiwan Coalfield, China

Table 2

Pore structure analyses of the oil shale and coal sample.

Sample	Measurement of micropores with CO2 adsorption		Measurement of mesopores with N2 adsorption		Measurement of macropores with MIP
	DFT-TPV	DFT-SSA	BJH-TPV	BET-SSA	MIP-TPV	MIP-SSA	Porosity
	(mL/g)	(m^2/g)	(mL/g)	(m^2/g)	(mL/g)	(m^2/g)	(%)
Oil shale	0.023	89.17	0.0018	3.43	0.0076	1.95	2.31
Coal	0.076	187.51	0.0054	6.92	0.017	2.23	5.82

Note. The sample weight is on an air-dried basis. SSA refers to specific surface area; TPV refers to total pore volume.