Coal
COAL PROPERTIES
RANK OF COAL
BTU/LB
% BY MASS
CARBON
NITROGEN
SULFUR
ASH
Anthracite
12,700
80.0 %
0.9 %
0.7 %
10.5 %
Low-Volatile Bituminous
14,350
81.7 %
1.4 %
1.2 %
6.0 %
Medium-Volatile Bituminous
14,000
81.4 %
1.4 %
1.5 %
6.0 %
High-Volatile Bituminous
13,800
75.9 %
1.5 %
1.5 %
6.5 %
Sub-Bituminous
9,000
52.5 %
1.0 %
1.0 %
9.8 %
Lignite
6,900
40.1 %
0.7 %
1.0 %
7.3 %