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DOE OSTI · 1976943

Extended thermodynamic model for high salinity produced waters

Tanveer, Sheik·Chen, Chau-Chyun
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Abstract

To support the development of desalination processes for high salinity produced waters, we developed a comprehensive thermodynamic model that reliably predicts the thermodynamic properties and phase behavior of produced water. Here this study extends a previously developed thermodynamic model for the aqueous hexary oceanic salt system by incorporating the Sr 2+ and Ba 2+ ions. Based on the electrolyte nonrandom two-liquid theory, the model requires two adjustable binary interaction parameters for each water-electrolyte and electrolyte-electrolyte pair that has a common ion. The binary interaction parameters for the electrolyte-electrolyte pairs involving Sr 2+ and Ba 2+ ions were identified using thermodynamic and salt solubility data. The model was validated for temperatures from 273.15 K to 473.15 K and electrolyte concentrations from infinite dilution to salt saturation. Extension of the model to include HCO 3 − , CO 3 2− , and CO 2 is currently in progress.

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42 ENGINEERINGaqueous electrolyteselectrolyte nonrandom two-liquid modelhigh salinity produced watersalt solubilitythermodynamic properties

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Tanveer, Sheik, Chen, Chau-Chyun. 2021-05-11. Extended thermodynamic model for high salinity produced waters. https://doi.org/10.1016/j.ces.2021.116754

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