Table 1: Analysis of the coals.

Components
(wt% / as air-dry)
BD coal WF coal ZH coal DS coal GG coal
Moisture 9.02 3.45 6.53 6.56 5.02
Ash 28.95 10.68 14.56 19.57 27.63
Volatility 6.55 28.56 35.56 16.56 9.88
C 52.85 70.62 64.53 65.23 58.79
H 2.86 4.56 3.53 2.15 2.54
O 0.96 8.26 9.25 2.22 1.58
N 0.85 1.21 1.06 1.12 0.88
S 4.51 1.22 0.54 2.15 3.56
Cl 0.007 0.028 0.015 0.009 0.020
Hg/ppm 1.68 0.45 0.26 0.85 1.28