Coal
Property | Specification |
Appearance | Black or brownish-black solid |
Shape | Irregular lumps, fine particles, or dust |
Density | 1.1 - 1.5 g/cm³ |
Hardness | Varies; generally 2 - 5 on the Mohs scale |
Moisture Content | 1% - 40% |
Volatile Matter | 10% - 50% |
Ash Content | 5% - 40% |
Fixed Carbon | 30% - 80% |
Calorific Value | 18 - 30 MJ/kg (depending on grade) |
Sulfur Content | 0.5% - 6% |
Carbon Content | 60% - 90% |
Fusibility (Softening Point) | 1,000°C - 1,200°C |
Conductivity | Low electrical conductivity |
Odor | Odorless (can have a sulfurous smell when burning) |