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Microporous and heterogeneous surface adsorption isotherms arising from Levy distributions

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  • Brouers, F.
  • Sotolongo, O.
  • Marquez, F.
  • Pirard, J.P.

Abstract

We show that for adsorption on heterogeneous and microporous surfaces, the Freundlich isotherm power-law exponent α is directly related to the Levy tail index of the distribution of the Langmuir parameter b and to the expected value and the variance of the adsorption energy distribution. This allows us to view adsorption at low pressure in these systems as a rare event dominated phenomena. Based on this discussion, a generalized isotherm formulation is proposed and applied to the interpretation of recent data on activated carbons.

Suggested Citation

  • Brouers, F. & Sotolongo, O. & Marquez, F. & Pirard, J.P., 2005. "Microporous and heterogeneous surface adsorption isotherms arising from Levy distributions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 349(1), pages 271-282.
    • Handle: RePEc:eee:phsmap:v:349:y:2005:i:1:p:271-282
    DOI: 10.1016/j.physa.2004.10.032
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    1. G. L. Klimchitskaya & R. Prioli & S. I. Zanette & A. O. Caride & O. Acselrad & I. S. Kalashnikov & E. M. Silva & R. A. Simão, 1999. "INVESTIGATION OF SURFACE MAGNETIC STRUCTURE IN STEELS OF A SYSTEMFe–Mn–Al–CBY ATOMIC FORCE MICROSCOPY," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 6(01), pages 115-125.
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