Method for the preparation of high surface area high permeability carbons
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. 3 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 350307
- Patent Number(s):
- 5902562
- Application Number:
- PAN: 8-960,112
- Assignee:
- Sandia Corp., Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 11 May 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 40 CHEMISTRY; CARBONACEOUS MATERIALS; SURFACE AREA; POROSITY; PERMEABILITY; DISSOLUTION; POLYMERS; GELS; DRYING; CARBON DIOXIDE; SUPERCRITICAL STATE; CARBONIZATION
Citation Formats
Lagasse, R R, and Schroeder, J L. Method for the preparation of high surface area high permeability carbons. United States: N. p., 1999.
Web.
Lagasse, R R, & Schroeder, J L. Method for the preparation of high surface area high permeability carbons. United States.
Lagasse, R R, and Schroeder, J L. Tue .
"Method for the preparation of high surface area high permeability carbons". United States.
@article{osti_350307,
title = {Method for the preparation of high surface area high permeability carbons},
author = {Lagasse, R R and Schroeder, J L},
abstractNote = {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. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 11 00:00:00 EDT 1999},
month = {Tue May 11 00:00:00 EDT 1999}
}