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1 Polish Journal of Chemistry

1 2006

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Modelling the Solubility of Gases in Saturated and Substituted Perfluoroalkanes

Dias A., Pamies J., Vega L., Coutinho J., Marrucho I.

Polish Journal of Chemistry

2006

Vol. 80, nr 1

143-152

The importance of the study of fluorinated molecules is justified by the innumerous applications that these compounds are founding in many diverse and interesting areas as a consequence of their unusual properties. They are being used as substitutes for chlorinated solvents, surfactants in supercritical solvents, environmental probes, and in numerous biomedical applications. The choice of the best fluoroalkane to be used for a given application depends on its properties and in some cases, such as in biomedical applications, that choice has to be precise. Thus, the knowledge of the thermodynamic properties of these compounds is of extreme importance as well as the ability to describe and predict them at different conditions using thermodynamic models. In this work, the soft-SAFT EoS is used to describe the solubility of gases as oxygen, xenon and radon in saturated and substituted perfluoroalkanes. The conclusions reached in this work corroborate the experimental evidences reported in the literature indicating that the interaction between the oxygen and the CF3 terminal group is stronger than the interaction between the oxygen and other fluorinated groups in the molecule.