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Adsorption of molecular gases on porous materials in the SAFT-VR approximation

Author

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  • Castro, M.
  • Martinez, R.
  • Martinez, A.
  • Rosu, H.C.

Abstract

A simple molecular thermodynamic approach is applied to the study of the adsorption of gases of chain molecules on solid surfaces. We use a model based on the Statistical Associating Fluid Theory for Variable Range (SAFT-VR) potentials [A. Gil-Villegas, A. Galindo, P.J. Whitehead, S.J. Mills, G. Jackson, A.N. Burgess, J. Chem. Phys. 106 (1997) 4168] that we extend by including quasi-two-dimensional approximation to describe the adsorption properties of these types of real gas [A. Martínez, M. Castro, C. McCabe, A. Gil-Villegas, J. Chem. Phys. 126 (2007) 074707]. The model is applied to ethane, ethylene, propane, and carbon dioxide adsorbed on activated carbon and silica gel, which are porous media of significant industrial interest. We show that the adsorption isotherms obtained by means of the present SAFT-VR modeling are in fair agreement with the experimental results provided in the literature.

Suggested Citation

  • Castro, M. & Martinez, R. & Martinez, A. & Rosu, H.C., 2010. "Adsorption of molecular gases on porous materials in the SAFT-VR approximation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 389(16), pages 3140-3148.
    • Handle: RePEc:eee:phsmap:v:389:y:2010:i:16:p:3140-3148
    DOI: 10.1016/j.physa.2010.04.028
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