Experimental Study on Reasonable Adsorption Time in Determination Coalbed Methane Content

Table 4

Test results of coal samples.

Coal sample	Adsorption capacity (cm^3/g)	Total specific surface area (m^2/g)	Pore volume (cm^3/g)	Average pore diameter (nm)
WYY	1.37001	1.174	0.002713	7.201
WYR	4.91424	4.164	0.007573	7.275
PY	1.33553	0.997	0.002467	10.119
PR	3.35253	1.425	0.005281	13.315
QFY	1.36169	0.701	0.002066	11.791
QFR	2.77532	1.065	0.004302	16.152