Study on the Effect of Soft and Hard Coal Pore Structure on Gas Adsorption Characteristics

Table 2

Coal sample nitrogen adsorption test results.

Coal type	Coal mine	Mark as	BET specific surface area (m^2·g^−1)	Langmuir specific surface area (m^2·g^−1)	BJH pore volume (cm^3·g^−1)	Average pore size (nm)
Soft coal	Lvtang	LT-1	12.2148	14.2310	0.008416	6.1773
		LT-2	14.3245	16.2412	0.007415	6.2112
Hard coal	Quanlun	QL-1	6.2271	8.1648	0.004452	14.8725
		QL-2	4.3718	6.2147	0.003674	15.5149