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

M. Castro, R. Martinez, A. Martinez and H.C. Rosu
Authors registered in the RePEc Author Service: Ricardo Martinez

Physica A: Statistical Mechanics and its Applications, 2010, vol. 389, issue 16, 3140-3148

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.

Keywords: Adsorption; Statistical associating fluid; Helmholtz free energy; Porous material (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:389:y:2010:i:16:p:3140-3148

DOI: 10.1016/j.physa.2010.04.028

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