Abstract
An analogy between vapor adsorbed equilibrium and vapor liquid equilibrium is made to determine the condition where azeotropes are observed, using a relationship between infinite dilution activity coefficients and pure component pressures in the reference state. The range of conditions where azeotropic behavior is expected in vapor-adsorbed equilibrium (VAE) was determined for the multisite Langmuir model for a mixture of two components with molecules of different size, and for CO2-C3H8 on NaX using an empirical model (Siperstein and Myers, 2001), which has been shown to correlate accurately experimental data.
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