A porous carbon material, a char which has been subjected to reaction with gases, sometimes with the addition of chemicals, e.g. ZnCl2
, before, during or after carbonization in order to increase its adsorptive properties.
Activated carbons have a large @A00156@, preferably for small molecules, and are used for purification of liquids and gases. By controlling the process of @C00840@ and @A00093@, a variety of active carbons having different @P04762@ can be obtained. Activated carbons are used mainly in granular and powdered forms, but can also be produced in textile form by controlled @C00840@ and @A00093@ of textile fibres. Other terms used in the literature: active carbons, active charcoals.
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 476 (https://doi.org/10.1351/pac199567030473)