bulk density (kg m−3) 197 201 174 170 particle density (kg m−3) 1431 1421 1526 1516 HHV (MJ kg−1) 21.25 21.09 23.27 24.38 weight loss (%) 9.60 10.97 33.94 40.45 energy yield (%) 93.89 91.77 75.13 70.96 Element Analysis (%) C 51.36 51.53 56.09 58.62 H 6.09 6.06 5.73 5.61 O 42.46 42.31 38.07 35.71 N 0.09 0.10 0.11 0.06