Theoretical Aspects of Multicomponent Adsorption Equilibria. Part I: Developmentof a Computationally Fast Adsorption Isothem Model That Can be Applied to Systems Which Demonstrate Energetic Heterogeneity

摘要

Theoretical aspects of multicomponent adsorption equilibria are investigated witha focus on the thermodynamically based Adsorbed Solution Theory (AST). This report details the development of a computationally fast, heterogeneous, biaary adsorption relation using the Langmuir isotherm with the Ideal AST (IAST) as the local, single component and mixture adsorption models. Equations are developed for binary systems which display both equal and unequal saturation/monolayer coverages. Additionally, equations for random and perfectly correlated heterogeneous site matching are developed. Theoretical results plotted as deviations from exact solutions indicate that the developed equations generate consistently better results than analogous homogeneous relations.