High pressure CO{sub 2} adsorption in activated carbon fibers
Conference
·
OSTI ID:370369
- Universidad de Alicante (Spain)
N{sub 2} adsorption at 77 K is the most usual adsorptive used, to characterize the porous texture of solid materials. Moreover, CO{sub 2} adsorption at, usually, 273 or 298 K and up to 0.1 MPa, is a good complement of N{sub 2} adsorption. The use of CO{sub 2} is specially interesting in those materials leaving narrow microporosity as the high temperature used during the adsorption allows its entrance into the narrow microporosity. In this work we have studied CO{sub 2} adsorption at 298 K up to 4 MPa in activated carbon fiber`s prepared by CO{sub 2} and steam activation. Tile objective is to analyze the use of high pressure CO{sub 2} adsorption to characterize not only the narrow microporosity but also wider ranges of porosity and to compare with N{sub 2} adsorption at 77 K. High pressure CO{sub 2} adsorption confirms that this adsorption has to be used, in addition to N{sub 2} adsorption, to achieve a complete characterization of the whole porous texture of porous materials.
- OSTI ID:
- 370369
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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