Table 2 Features of the pore size distribution in different coal samples.

From: Gas adsorption analysis of pore structure differences and influencing factors in coal with varying metamorphic grades

Coal sample

Pore volume

 × 103

Volume of each aperture (cm3·g−1)

Pore specific surface area

Specific surface area of each pore size (m2·g−1)

Filled pores

Diffusion pores

Seepage pores

Filled pores

Diffusion pores

Seepage pores

1

13.70

11.50

1.83

0.37

40.36

39.07

1.27

0.02

2

26.92

19.46

6.74

0.78

49.39

47.54

1.83

0.02

5

21.05

18.12

2.65

0.28

63.51

61.82

1.68

0.01

4

35.13

17.17

17.38

0.58

72.35

58.23

14.10

0.02

5

44.49

37.50

6.20

0.79

73.35

66.95

6.25

0.15

6

44.97

33.05

10.11

1.81

115.93

112.58

3.29

0.06

7

53.97

38.95

11.50

3.52

132.70

128.62

3.96

0.12

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