Experimental Investigation of Coal Dust Wettability Based on Surface Contact Angle

Table 3

Summary of experimental data about the porosity of coal sample in #10301, #1308, and #7301 work face.

Experiment items	#10301	#1308	#7301
Multipoint BET specific surface area/(m^2g^−1)	4.547	5.260	6.368
Specific surface area of BJH accumulative adsorption/(m^2g^−1)	0.861	0.790	1.882
Specific surface area of BJH accumulative desorption/(m^2g^−1)	1.841	1.362	2.753
Total pore volume of single-point/(ccg^−1)	0.0212	0.0136	0.0096
Total pore volume of BJH accumulative adsorption/(ccg^−1)	0.0193	0.0092	0.0087
Total pore volume of BJH accumulative desorption/(ccg^−1)	0.0184	0.0087	0.0081
Micropore volume of single-point adsorption/(ccg^−1) (radius < 10 Å)	0.0024	0.0027	0.0031
Mean bore radius of single-point/Å	66.6	51.4	45.5
Mean bore radius of BJH adsorption/Å	206.0	221.5	210.1
Mean bore radius of BJH desorption/Å	135.7	122.6	96.4
Most probable aperture of BJH adsorption/Å	72.7	82.9	64.6
Most probable aperture of BJH desorption/Å	19.4	19.0	18.3