Charcoal
Charcoal is a light black residue consisting of carbon, and any remaining ash, obtained by removing water and other volatile constituents from animal and vegetation substances. Charcoal is usually produced by slow pyrolysis, the heating of wood or other substances in the absence of oxygen (see pyrolysis, char and biochar). It is usually an impure form of carbon as it contains ash; however, sugar charcoal is among the purest forms of carbon readily available, particularly if it is not made by heating but by a dehydration reaction with sulfuric acid to minimise introducing new impurities, as impurities can be removed from the sugar in advance. The resulting soft, brittle, lightweight, black, porous material resembles coal.
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Famous quotes containing the word charcoal:
“For lack of wood the fire goes out, and where there is no whisperer, quarreling ceases. As charcoal is to hot embers and wood to fire, so is a quarrelsome person for kindling strife.”
—Bible: Hebrew, Proverbs 26:20-21.