Experimental adsorption isotherms based on inverse gas chromatography.

A new chromatographic perturbation method is used for studying the adsorption–desorption equilibrium in various gas–solid heterogeneous systems. It is the reversed-flow method giving accurate and precise values of many physicochemical constants including the basic and necessary adsorption isotherm values. For four inorganic oxides, namely, Cr2O3, Fe2O3, TiO2 and PbO, and two aromatic hydrocarbons (benzene, toluene) these adsorption isotherms have been determined through a non-linear model.