Adsorption of Gas Mixtures: Effect of Energetic Heterogeneity
The ideal adsorbed solution (IAS) theory of adsorption of gas mixtures is extended to the case of energetic heterogeneity. A heterogeneous ideal adsorbed solution (HIAS) behaves ideally on a particular site, but energetic heterogeneity causes a segregation in the composition of the adsorbed phase. Equilibrium properties are obtained by integrating over a multivariate energy distribution based upon perfect positive correlation of site energies. The fact that predictions from HIAS are always an improvement over IAS indicates that heterogeneity is a factor that must be considered in theories of mixed-gas adsorption. Errors in HIAS predictions may be caused by steric exclusion of the larger molecules from micropores accessible to smaller molecules.
Valenzuela, D. P.; Myers, Alan L.; Talu, Orhan; and Zwiebel, I., "Adsorption of Gas Mixtures: Effect of Energetic Heterogeneity" (1988). Chemical & Biomedical Engineering Faculty Publications. 97.
D. P. Valenzuela, A. L. Myers, O. Talu2 & I. Zwiebel3. (1988). Adsorption of Gas Mixtures: Effect of Energetic Heterogeneity. AIChE Journal, 34, 3, 397-402.