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For other uses, see Char (disambiguation).
Residue from burning
Char is the solid material that remains after light gases (e.g. coal gas) and tar have been driven out or released from a carbonaceous material during the initial stage of combustion, which is known as carbonization, charring, devolatilization or pyrolysis.
Further stages of efficient combustion (with or without char deposits) are known as gasification reactions, ending quickly when the reversible gas phase of the water gas shift reaction is reached.
See also
References
Coal types by grade (lowest to highest) | ||
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Coal combustion | ||
Coal mining |
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Note: [1] Peat is considered a precursor to coal. Graphite is only technically considered a coal type. |
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