Table 1 Industrial analysis of samples and their measured vitrinite reflectance.

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

Coal sample number

Sampling location

Moisture/%

Ash content/%

Volatile content/%

Fixed carbon/%

vitrinite reflectance/%

coal quality

1

SL

2.82

3.07

30.98

63.14

0.56

long flame coal

2

XZ

4.71

15.68

32.25

53.55

0.64

non-caking coal

3

HJH

3.49

14.78

30.87

54.68

0.68

non-caking coall

4

HLL

6.73

6.79

36.61

51.61

0.72

non-caking coal

5

AJ

1.78

15.54

39.43

45.11

0.69

gas coal

6

CZ

1.49

10.53

5.41

82.57

2.68

anthracite

7

ZG

0.44

10.97

6.47

82.12

4.02

anthracite

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