Adsorption properties of carbon adsorbents.communication 5. Peculiarities in the sorption of water vapor by active carbons at high relative pressures

Abstract

1. Isotherms for the sorption of water vapor by active carbons with a developed transitional porosity have been studied. 2. Under measurement conditions corresponding to the attainment of sorption equilibrium for organic vapors, at the limiting sorption of water vapor by active carbons there is filling of the volumes of micropores with liquid vapor and the formation of a polymolecuiar adsorption layer on the surface of transitional pores. 3. In much longer experiments, there was filling of the volume of transitional pores of active carbons as a result of capillary condensation of water vapor. 4. The possible reasons for slow capillary condensation of water vapor in transitional pores of active carbon are discussed.