Estimation of micropore size distribution in active carbons from adsorption isotherms of water vapor |
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| Authors: | V V Gur’yanov G A Petukhova L A Dubinina |
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| Institution: | (1) Public Joint-Stock Company of the Elektrostal Research-and-Production Association “Neorganika”, 4 ul. K. Marksa, 144001 Elektrostal, Moscow Region, Russian Federation;(2) A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Federation, 31 Leninsky prosp., 119991 Moscow, Russian Federation |
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| Abstract: | A possibility of estimation of the micropore size distribution in the carbon adsorbents with the developed micro-and mesoporous
structure by analysis of the adsorption isotherms of water vapors was considered. At saturation water condenses in micropores
in a form of a weakly compressed liquid. However, water molecules in micropores are packed not so closely as in the liquid
because of steric hindrance. Therefore, the real density of water adsorbed in the micropores is lower than that of water adsorbed
on an open surface and lower than the density of the normal liquid. An analysis of the adsorption isotherms of water vapors
with account for the both opposite effects on the water density gives reliable data on the micropore sizes of the carbon adsorbents.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 40–43, January, 2007. |
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| Keywords: | carbon adsorbents water adsorption linear micropore sizes |
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