Abstract
Adsorption of binary gas mixtures measured at constant total pressure is discussed by assuming the surface homogeneity and heterogeneity for the adsorbents. Similarly as for mixed-gas adsorption at constant adsorbed amount of one of the components, the equations for partial adsorption isotherms at constant total pressure can be expressed as functions of the partial pressures, i.e., partial adsorption vs partial pressures. For full monolayer coverage these equations assume a form similar to that describing the adsorption from ideal solutions. The analogy between adsorption from gas mixtures and adsorption from ideal solutions is discussed on the basis of the derived equations. Experimental data concerning the adsorption from hydrocarbon mixtures on charcoal, activated carbon, and silica gel are analyzed by using the derived equations.
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