| |
It consists of volatile substances formed during heating of coal in absence of air . Essentially these are gaseous substances like  , ,  ,  ,   , and other hydrocarbons. Volatile matter does not include moisture of coal but includes water formed during reaction between hydrogen and oxygen of coal
How to report analysis?
The different ways to report analysis of coal can be illustrated by an example. Consider sub-bituminous coal.
Proximate Analysis
| |
As received |
Dry Basis* |
Dry-ash free** |
Dry mineral matter free*** |
%M |
6.8 |
− |
− |
− |
%A |
12.3 |
13.2 |
− |
− |
%VM |
36.2 |
38.84 |
44.7 |
44.6 |
%FC |
44.2 |
47.42 |
54.7 |
55.4 |
%S |
0.5 |
0.54 |
0.6 |
− |
Total |
100.0 |
100.0 |
100.0 |
100.0 |
|
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