Article ID Journal Published Year Pages File Type
74539 Microporous and Mesoporous Materials 2012 6 Pages PDF
Abstract

In this work, a new Real Adsorbed Solution Theory (RAST) model, for competitive multicomponent adsorption equilibrium correlation in liquid systems has been developed. The model is derived from Ideal Adsorbed Solution Theory; in its formulation it explicitly takes into account the non-ideal behavior shown by most of the adsorption systems. The occurrence of interactions among adsorbed molecules is accounted for by the introduction of activity coefficients, as a function of sorbates adsorption capacity and spreading pressure. These coefficients are experimentally evaluated through multicomponent adsorption isotherms determination, also considering single-compound adsorption isotherm parameters in the model formulation. The RAST model was tested on the experimental results of tetrachloroethylene/trichloroethylene (PCE/TCE) binary mixtures adsorption, obtained at constant temperature and different concentration ratio of the two compounds. This model, with the experimental determination of activity coefficients, allowed an accurate description of PCE/TCE binary adsorption experimental data, thus being a reliable instrument for the design of industrial adsorption equipment for wastewater containing a mixture of pollutants.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Experimental and modeling analysis of PCE/TCE adsorption in multicomponent systems. ► Develop of a new model taking into account for the non-ideality of system. ► Analytical description of activity coefficients.

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
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