NUMERICAL THERMODYNAMIC MODEL OF THE FLUID SYSTEM H₂O–LiCl–CaCl₂ IN THE TEMPERATURE RANGE FROM –77 TO +50 °C
- Authors: Misyura M., Bushmin S.A., Savva E.V.
- Issue: Vol 525, No 1 (2025)
- Section: GEOCHEMISTRY
- Submitted: 12.06.2025
- Accepted: 22.07.2025
- Published: 20.08.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/296874
- ID: 296874
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Abstract
A numerical thermodynamic model of the fluid system H₂O–LiCl–CaCl₂ is proposed for the temperature range from –77 to +50 °C, employing newly derived temperature-dependent parameters for the interactions of Li, Ca, and Cl ions and the corresponding solubility product constants within the Pitzer approach. Based on this model, a phase diagram was constructed that includes the calculated eutectic point E″ and peritectic points P₁″, P₂″, P₃″, P₄″, and P₅″ in the ternary system H₂O–LiCl–CaCl₂, as well as various phase boundaries of crystalline hydrates with their figurative points. The diagram also presents the calculated eutectic point E and peritectic point P for the binary H₂O–CaCl₂ system, and the eutectic point E′ and peritectic points P₁′, P₂′, and P₃′ for the binary H₂O–LiCl system. The model-predicted eutectic and peritectic characteristics in the binary subsystems, along with the solubilities of solid phases (salt hydrates), show good agreement with experimental data.
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About the authors
Maksim Misyura
Author for correspondence.
Email: max.misyura94@gmail.com
Russian Federation
Sergey Alekseevich Bushmin
Email: s.a.bushmin@ipgg.ru
Elena Vladimirovna Savva
Email: e.v.savva@ipgg.ru
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