Charcoal is made From Wood, and is very Used For BBQ Grill, Charcoal is a lightweight black carbon residue produced by strongly heating wood in minimal oxygen to remove all water and volatile constituents. Charcoal is a high surface area compound. Therefore, it absorbs chemicals in the stomach. Activated charcoal is a fine powder black in color, made from bone char, coconut shells, peat, petroleum coke, and coal. Charcoal gets activated when heated at a high temperature. The heating process for the formation of activated charcoal increases the surface area by reducing the pore size.