Abstract

Expressions based on different considerations are given for representing pure gas adsorption equilibrium data (isotherm data). Theories of predicting multicomponent gas adsorption equilibrium from pure gas equilibrium data are given with examples illustrating the procedures involved. Adsorption of solute from liquid solutions including the difference between adsorption of individual solute and surface excess and that between the composite isotherm and individual isotherm based on Kipling's work are discussed in detail. The extension of the methodologies developed for gas adsorption to adsorption from liquid solutions and the difficulties involved are explained. The conditions under which the two types of isotherms may converge are identified.

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