Pore Structure Characteristics and Evolution Law of Different-Rank Coal Samples

Table 3

Joint characterization results of pore specific surface area.

Sample	Specific surface area (m^2/g)				Total specific surface area (m^2/g)
	Macropore	Mesopore	Small pore	Micropore
Sample 1	0.027	0.154	1.127	2.913	4.221
Sample 2	0.017	0.126	0.757	2.005	2.905
Sample 3	0.017	0.085	0.691	2.017	2.810
Sample 4	0.003	0.042	0.610	1.444	2.099
Sample 5	0.002	0.030	0.467	4.689	5.188
Sample 6	0.001	0.065	0.820	7.282	8.168