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Separation of gas mixtures by pressure swing and thermal swing adsorption processes is an established unit operation in the chemical industry. Mathematical simulations of these processes require precise knowledge of multicomponent gas adsorption equilibria, kinetics, and heats for the system of interest over all conditions of pressure, temperature, gas composition and adsorbate loading encountered by the adsorber during the separation process. Unfortunately, the published data on heats of adsorption are often not adequate. Limited heat data are generally available for pure gas adsorption, heat data for binary gas mixtures are rare, and heat data for mixtures containing three or more components are nonexistent.
Sircar et al. (Tue,) studied this question.