Considerations about the building of a thermodynamic database for the chemical description of highly saline systems

Arnault Lassin (1) , Anne-Laure Thadée (1, 2) , Adeline Lach (1) , Laurent André (1) , Sylvain Guignot (1) , Jean-Paul Serin (2) , Pierre Cézac (2)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 LATEP - Laboratoire de Génie Thermique Énergétique et Procédés (EA1932)

Amongst the existing models able to describe highly concentrated aqueous systems and solid-liquid or gas-liquid equilibria up to elevated temperatures and pressures, the semi-empirical Pitzer model has been shown to be powerful. Calculation codes are now available for applying this model to such complex natural and industrial systems. The key point remains the building of related thermodynamic databases of high quality. In this work, we present elements of a strategy to build and extend such a database for widespread use.

Keywords: Saline systems; Pitzer model; Thermodynamic database; Parameter estimation; Ion-pairing

Domains: Geochemistry

Arnault Lassin, Anne-Laure Thadée, Adeline Lach, Laurent André, Sylvain Guignot, et al.. Considerations about the building of a thermodynamic database for the chemical description of highly saline systems. Procedia Earth and Planetary Science, 2016, 17, pp.304-307. ⟨10.1016/j.proeps.2016.12.064⟩. ⟨hal-01332204⟩