A porous carbon material
, a char
which has been subjected to reaction with gases, sometimes with the addition of chemicals,
, before, during or after carbonization
in order to increase its adsorptive
Activated carbons have a large adsorption capacity
, preferably for small molecules, and are used for purification of liquids and gases.
By controlling the process of carbonization
, a variety of active carbons having different porosity
can be obtained. Activated carbons are used mainly in granular and powdered forms,
but can also be produced in textile form by controlled carbonization
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
on page 476