Table 2 Chemical characteristics of the test samples
Parameters | Original DBC | 650 °C DBC charcoal | 900 °C DBC charcoal | Bituminous coala |
|---|---|---|---|---|
Ultimate analysis | ||||
Carbon (%wt) | 45.3 | 87.9 | 90.8 | 71.3 |
Hydrogen (%wt) | 6.6 | 1.9 | 0.1 | 5.5 |
Nitrogen (%wt) | 0.3 | 0.7 | 0.8 | 1.4 |
Sulfur (%wt) | 0.2 | 0.3 | 0.2 | 1.7 |
Oxygen (%wt) | 47.6 | 9.3 | 8.1 | 8.7 |
Atomic molar ratio | ||||
H/C | 1.76 | 0.26 | 0.02 | 0.93 |
O/C | 0.79 | 0.08 | 0.07 | 0.09 |
C/N | 189 | 155 | 128 | 59 |
Sulfur content to calorific value ratio (× 10−5 kg MJ−1) | 9.7 | 9.7 | 7.8 | 50 |