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Adsorption of Gas Mixtures: Effect of Energetic Heterogeneity
AIChE Journal
  • D. P. Valenzuela, University of Pennsylvania
  • Alan L. Myers, University of Pennsylvania
  • Orhan Talu, Cleveland State University
  • I. Zwiebel
Document Type
Publication Date
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.
Citation Information
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.