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Article
Activity Coefficients of Adsorbed Mixtures
Adsorption-Journal of the International Adsorption Society
  • Orhan Talu, Cleveland State University
  • Jianmin Li, Cleveland State University
  • Alan L. Myers, University of Pennsylvania
Document Type
Article
Publication Date
1-1-1995
Abstract
Experimental and simulated data for adsorption of gas mixtures on energetically heterogeneous surfaces like activated carbon and zeolites exhibit negative deviations from ideality. The deviations are large in some cases, with activity coefficients at infinite dilution equal to 0.1 or less. Similar molecules form ideal mixtures, but molecules of different size or polarity are nonideal. Equations for bulk liquid mixtures (Wilson, Margules, etc.) do not apply to isobars for adsorbed mixtures. A two-constant equation for activity coefficients as a function of composition and spreading pressure is in good agreement with theory, simulation, and experiment.
DOI
10.1007/BF00704999
Version
Postprint
Citation Information
Talu, O., Li, J., , & Myers, A. L. (1995). Activity coefficients of adsorbed mixtures. Adsorption, 1(2), 103 - 112. doi:10.1007/BF00704999