Effect of Analytical Particle Size on Pore Structure of High Volatile Bituminous Coal and Anthracite Using Low-Pressure N₂ and CO₂ Adsorption

Table 2

Pore structure parameters using low-pressure gas adsorption analysis on the coal subsamples with different particle sizes.

Subsample no.	Particle size range	N2 adsorption		CO2 adsorption
		Mesopore SSA	Mesopore volume	Micropore SSA	Micropore volume
	mm	m^2/g	cm^3/g	m^2/g	cm^3/g
XJ-01	0.50–1.00	1.10	0.0036	117.1	0.0153
XJ-02	0.25–0.50	1.33	0.0040	127.5	0.0192
XJ-03	0.125–0.250	1.51	0.0050	122.6	0.0209
XJ-04	0.063–0.125	1.72	0.0062	124.6	0.0223
XJ-05	0.032–0.063	3.12	0.0109	117.2	0.0204
GZ-01	0.50–1.00	0.20	0.0007	257.3	0.0394
GZ-02	0.25–0.50	0.26	0.0012	241.5	0.0412
GZ-03	0.125–0.250	0.48	0.0021	216.2	0.0402
GZ-04	0.063–0.125	0.62	0.0030	197.5	0.0368
GZ-05	0.032–0.063	1.24	0.0060	172.7	0.0339

SSA: specific surface area.