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Aqueous Solubility of Hydrocarbon Mixtures

Abstract : The solubility of hydrocarbon components in water is of great importance for the environmental sciences. Its prediction is usually based on using the pure component solubilities and the mole fraction of the components in the mixture. While the pure component solubilities are generally well known, few data exist on the solubility of mixtures. Using a simple relationship leads to an underestimation of the true solubility. This paper presents some new data on the aqueous solubility of binary hydrocarbon mixtures. Using a rigorous thermodynamic analysis, we explain the observed behavior, as well as other data from the literature, including the solubility of jet fuel mixtures in water. The activity coefficient models used for this purpose are NRTL, UNIQUAC and UNIFAC. Considering the small concentration in oil of some very soluble substances, the activity coefficient can become significant and thus explain the fact that solubilities of some component may be as much as twice as large as expected.
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J. C. de Hemptinne, H. Delepine, C. Jose, J. Jose. Aqueous Solubility of Hydrocarbon Mixtures. Revue de l'Institut Français du Pétrole, EDP Sciences, 1998, 53 (4), pp.409-419. ⟨10.2516/ogst:1998035⟩. ⟨hal-02079003⟩



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