Coal | LIG | SUB | BIT-LV | BIT-HV | SA | ANT |
Inherent moisture (air dried) wt% | 1.7 | 1.9 | 1.3 | 2.7 | 2.3 | 2.5 |
Ash (air-dried) wt% | 0.8 | 2.0 | 3.3 | 1.2 | 1.8 | 1.5 |
Volatile matter (air-dried) wt% | 60.3 | 43.2 | 25.0 | 27.2 | 9.6 | 6.8 |
Fixed carbon (air-dried) wt% | 37.3 | 53.0 | 70.4 | 68.9 | 86.3 | 89.2 |
Carbon (daf) wt% | 69.2 | 75.1 | 80.9 | 83.4 | 89.0 | 85.6 |
Hydrogen (daf) wt% | 6.2 | 5.2 | 4.2 | 4.6 | 3.3 | 2.4 |
Nitrogen (daf) wt% | 0.6 | 1.8 | 2.3 | 2.0 | 1.8 | 2.0 |
Oxygen (daf) wt% | 20.3 | 17.4 | 12.3 | 9.1 | 5.0 | 7.7 |
Sulphur (daf) wt% | 2.7 | 0.1 | 0.3 | 1.0 | 0.7 | 2.1 |
Gross calorific value (MJ/kg) | 28.9 | 29.3 | 30.0 | 32.0 | 33.3 | 32.7 |
Total reflectance (Ro) | 0.35 | 0.77 | 1.27 | 1.23 | 2.45 | 2.94 |
H/C | 1.08 | 0.83 | 0.62 | 0.66 | 0.45 | 0.34 |
O/C | 0.22 | 0.17 | 0.11 | 0.08 | 0.04 | 0.07 |
fa | 0.40 | 0.58 | 0.74 | 0.72 | 0.84 | 0.98 |
Fuel ratio | 0.6 | 1.2 | 2.8 | 2.5 | 9.0 | 13 |
DR surface area (m2/g) | 109 | 140 | 169 | 142 | 199 | 136 |