Table 5 Comparative analysis of chemical properties in biochar obtained from softwood and hemp
Sample | Proximate analysis, wt% | Ultimate analysis, wt% | ||||||
|---|---|---|---|---|---|---|---|---|
Moisture content | Volatile matter | Fixed carbon | Ash | C | H | N | O | |
Softwood (raw) | 11.5 | 67.3 | 19.5 | 1.7 | 44.43 | 6.16 | 0.18 | 49.23 |
Hemp (raw) | 10.7 | 69.6 | 18.8 | 0.9 | 45.71 | 5.89 | – | 48.40 |
SW-2100 | 4.8 | 32.1 | 60.0 | 3.1 | 79.97 | 3.53 | 0.01 | 16.49 |
SW-2400 | 4.7 | 29.2 | 61.3 | 4.8 | 79.82 | 3.55 | 0.01 | 16.62 |
SW-2700 | 3.9 | 25.0 | 69.1 | 2.0 | 77.48 | 3.64 | 0.10 | 18.78 |
HM-2100 | 2.8 | 27.6 | 66.8 | 2.8 | 78.19 | 3.22 | 0.69 | 17.90 |
HM-2400 | 4.8 | 26.1 | 68.1 | 1.0 | 76.95 | 3.32 | 0.74 | 18.99 |
HM-2700 | 2.7 | 25.0 | 71.3 | 1.0 | 78.54 | 3.25 | 0.59 | 17.62 |