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| Oxygen, Water and Ash Content of Certain Solid Fuels |
Moisture in Solid Fuel: |
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- Free
- Bound water
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Fuel moisture content will affect rate of combustion and overall efficiency. |
| Ash: |
The inorganic materials, which remain as residue even after complete combustion. |
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Ash content affects the performance of the combustion system.
Ash content causes fouling of the boilers. |
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Fuel |
Oxygen (Dry, Ash-free) |
Moisture (Ash-free) |
Ash (Dry) |
Wood |
40-45% |
15-70% |
0.1-1.0% |
Peat |
30-35% |
70-90% |
0.1-20% |
Lignite coal |
20-25% |
20-30% |
>5% |
Bituminous coal |
3-5% |
10-5% |
>5% |
Anthracite coal |
1-2% |
2-4% |
>5% |
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