source: mcot.net – Tvburabha.com

wood charcoal is a substance obtained by partial burning or destructive distillation of wood. It is largely pure carbon. Wood charcoal is prepared by heating wood in the absence of oxygen. In this process volatile compounds in the wood (e.g., water, hydrogen, methane and tars) pass off as vapors into the air, and the carbon is converted into charcoal. With the volatile component driven off, you are left with wood charcoal that is about 20 to 25-percent of the original volume of the wood. It’s chiefly carbon, with traces of volatile chemicals and ash. When it burns, it won’t produce as much smoke as burning wood, and it will burn long, hot and steady. Charcoal, being almost pure carbon, yields a larger amount of heat in proportion to its volume than is obtained from a corresponding quantity of wood.

Charcoal street