Method for the preparation of high surface area high permeabilit

Details Method for the preparation of high surface area high permeabilit Method for the preparation of high surface area high permeabilit

1997-10-27

1999-05-11

Bos, Steven

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234471, D01F9/12

Patent

active

059025620

ABSTRACT:
A method for preparing carbon materials having high surface area and high macropore volume to provide high permeability. These carbon materials are prepared by dissolving a carbonizable polymer precursor, in a solvent. The solution is cooled to form a gel. The solvent is extracted from the gel by employing a non-solvent for the polymer. The non-solvent is removed by critical point drying in CO.sub.2 at an elevated pressure and temperature or evaporation in a vacuum oven. The dried product is heated in an inert atmosphere in a first heating step to a first temperature and maintained there for a time sufficient to substantially cross-link the polymer material. The cross-linked polymer material is then carbonized in an inert atmosphere.

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