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Standard grades of coal and heating values
Heating values of standard grades of coal:
| Coal Grade |
Heating Value |
| (Btu/lb) |
(kJ/kg) |
| Anthracite |
12910 |
30080 |
| Semi-Anthracite |
13770 |
32084 |
| Low-volatile bituminous |
14340 |
33412 |
| Medium-volatile bituminous |
13840 |
32247 |
| High-volatile bituminous A |
13090 |
30499 |
| High-volatile bituminous B |
12130 |
28262 |
| High-volatile bituminous C |
10750 |
25047 |
| Subbituminous B |
9150 |
21319 |
| Subbituminous C |
8940 |
20830 |
| Lignite |
6900 |
16077 |
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