Abstract

The adsorption isotherm for heterogeneous surfaces can be very well approximated by the exponential higher degree polynomial of variable In ( p/ p 0). This equation is obtainable by statistical thermodynamics methods. On some simplifying assumptions one can obtain the Dubinin-Radushkevich and Freundlich adsorption isotherms from the exponential isotherm. The energy distribution function corresponding to the exponential adsorption isotherm can be calculated in the way analogous to that for DR isoterm.

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