METHOD OF MAKING CHEMICALLY ACTIVATED CARBON

摘要

A method is described to make a chemically activated carbon by first immersing a suitable carbonized material into a neutral aqueous solution of inorganic salts that constitutes the chemical activating agent. The carbonized material is then removed and forms a chemically loaded activatable material that is separately heated at temperatures up to 1000° C. to form the chemically activated carbon. An additional CO2 or steam activation step is implemented to increase the surface area up to ˜3000 m2/gm. The chemical activating agents are nitrate salts in aqueous solutions, and may be reused since they are not directly heated as part of the activation process. The carbonized precursor materials include naturally occurring sources of carbon, synthetic polymeric materials and petroleum based sources.

主权项

1. A method of producing a chemically activated carbon, comprising:
immersing a carbonized material into a solution of an inorganic nitrate salt in at least one of a water and organic solvent for a period of time to make a chemically loaded activatable material; removing the chemically loaded activatable material from the solution and chemically activating by heating at a controlled temperature to make a chemically activated material, and thoroughly washing the chemically activated material to remove all residue to obtain the chemically activated carbon.