Table 1. Yield and proximate analysis (volatile matter, ash, carbon fixed) of biochars produced at different pyrolysis temperatures.
| Biomass | Temp. (°C) | Yield (%) | Proximate analysis (wt. %) | ||
|---|---|---|---|---|---|
| Volatile Matter | Ash | Carbon Fixed | |||
| Chicken manure | 350 | 69.7 | 36.9 Ab | 52.0 Ba | 11.1 Cd |
| 450 | 63.0 | 30.6 Ba | 55.3 Aa | 14.1 Be | |
| 750 | 55.9 | 26.5 Ca | 56.4 Aa | 17.0 Ae | |
| Eucalyptus sawdust | 350 | 42.5 | 36.9 Ab | 0.9 ABe | 62.2 Cb |
| 450 | 36.0 | 28.5 Bb | 0.7 Be | 70.8 Bb | |
| 750 | 28.2 | 6.5 Cd | 1.1 Ae | 92.4 Aa | |
| Coffee husk | 350 | 43.5 | 34.6 Ac | 12.9 Bb | 52.5 Cc |
| 450 | 37.7 | 26.2 Bc | 12.9 Bb | 60.9 Bc | |
| 750 | 31.6 | 17.6 Cb | 19.6 Ab | 62.8 Ad | |
| Sugarcane bagasse | 350 | 37.5 | 35.0 Ac | 1.9 Ad | 63.0 Ca |
| 450 | 33.2 | 24.0 Bd | 2.1 Ad | 73.9 Ba | |
| 750 | 26.9 | 7.7 Cc | 2.2 Ad | 90.1 Ab | |
| Pine bark | 350 | 59.6 | 38.5 Aa | 8.3 Bc | 53.2 Cc |
| 450 | 49.3 | 29.3 Ba | 7.9 Bc | 62.8 Bc | |
| 750 | 38.9 | 6.0 Cd | 14.5 Ac | 79.4 Aa | |
Uppercase letters compare pyrolysis temperatures within the same biomass and lowercase letters compare biomass at the same temperature. The same letter do not differ by the Tukey test at p <0.05.