Char

Multi tool use
Multi tool use




"Fixed carbon" redirects here. For the biological process, see Carbon fixation.

For other uses, see Char (disambiguation).





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



  • Biochar

  • Charcoal

  • Coke (fuel)

  • Petroleum coke

  • Shale oil extraction

  • Spent shale











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