Geology Reference
In-Depth Information
Table 3.1.5
The maximum value of rank parameters (after Diessel, 1992) with further subdivisions of lower rank coals after Teichmüller (in Stach et al., 1982).
Vitrinite reflectance (%)
(Oil, 546 nm)
(Teichmüller, 1982)
Vitrinite reflectance (%) (Oil,
546 nm) (Diessel, 1992)
Volatile
matter (daf)
(%)
Carbon (daf)
(%)
Gross-specific
energy (MJ/kg)
In situ
moisture
Rank stage
(%)
R
random
R
max
Rank subclass
R
random
Wood
50
65
>
Peat
60
60
14.7
75
0.20
0.20
0.26
>
Lignite
71
52
23
30
0.40
0.42
0.38
Subbituminous
80
40
33.5
5
0.60
0.63
C
0.42
B
0.49
A
0.65
High volatile bituminous
86
31
35.6
3
0.97
1.03
C
0.65
B
0.79
A
1.11
Medium volatile bituminous
90
22
36
<
1
1.47
1.58
1.50
Low volatile bituminous
91
14
36.4
1
1.85
1.97
1.92
Semianthracite
92
8
36
1
2.65
2.83
2.58
Anthracite
95
2
35.2
2
6.55
7.00
5.00
Note
: Overlap of subbituminous A and high volatile C bituminous ranks as expressed in vitrinite reflectance. Distinction between subbituminous and high volatile bituminous coals must be made on other parameters:
e.g., agglomerating properties of high volatile bituminous coals and solubility of subbituminous coals in KOH solutions.daf: dry, ash free.
