Table 3: Ultimate (DAF basis) and proximate analysis of coffee husk biomass.

Coffee husk

C%46.51
H%6.77
O%46.20
N%0.43
S%0.09
Ash%0.68
Moisture%7.22
FC%15.5
VM%76.6
HHV (kJ/kg)17 945
HHVDAF (kJ/kg)18 068
Empirical formula C H 1 . 7 4 6 O 0 . 7 5 N 0 . 0 0 8 S 0 . 0 0 0 7