Adsorption equilibria of the pure component and binary gaseous mixtures of water vapor and organic compound (toluene or n-butanol) on two selected activated carbons: Sorbonorit 4 and BPL 4Â6 were studied. A mathematical model of the adsorption equilibrium for binary systems with the virial mixture coefficients has been developed based on the two-dimensional virial equation of state. In the modeling, the experimental adsorption equilibrium data of pure components were correlated by the Toth isotherm for organic compounds, and Talu-Meunier or Qi-LeVan models for water vapor. Additionally, multitemperature isotherms for pure component were calculated to determine virial mixture coefficient of the two-dimensional virial equation of state depending on temperature. Adsorption isotherms determined for twocomponent systems were compared with multicomponent adsorption equilibrium data obtained experimentally by a dynamic method at relative humidities of the carrier gas set at 25, 50, 75, and 90%. A fairly good agreement between simulations and experimental results was obtained using expansion of the two-dimensional virial equation of state through D terms.
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