Char (chemistry)
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Template:Other uses Template:Expand language Template:More citations needed Template:Wiktionary Template:Short description 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.<ref>Template:Cite journal</ref><ref>Template:Cite journal</ref>
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.