Standard Grade Coal - Heat Values
Approximate Lower 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 |
| Sub-bituminous B | 9150 | 21319 |
| Sub-bituminous C | 8940 | 20830 |
| Lignite | 6900 | 16077 |
- Anthracite Coal is very shiny, hard black coal, high carbon content and energy density, repels moisture, for domestic industrial uses, including smokeless fuel
- Bituminous Coal is softer and shiny, moisture content is 8 -20%, possible for coking coals, volatile matter from 16% - 40%, can be used for thermal or metallurgical applications
- Sub-bituminous Coal is soft and black with energy density lower than bituminous coal, most common type for electricity generation
- Lignite Coal is light brown with high moisture content and low energy density, used mainly for electricity generation
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