Fractal dimension of microporous carbon on the basis of Polanyi-Dubinin theory of adsorption. Dubinin-Radushkevich adsorption isotherm equation

A new adsorption isotherm equation has been proposed which allows calculation of the structural parameters of activated carbons, including the fractal dimension. The equation is based on the extension of the potential theory of adsorption which was formulated by Dubinin and Stoeckli, and the pore size distribution proposed by Pfeifer and Avnir. In this paper the properties of the new equation and the energetics of adsorption in fractal microporous solids are discussed. The adsorption results, obtained on the basis of some model calculations, are not in agreement with those published by Avnir and Jaroniec which were based on the approximate solution of the problem presented here.