Thermodynamic modeling of calcium carbonate scale precipitation: aqueous Na+-Ca2+-Cl–-HCO3–-CO32–-CO2 system
نویسندگان
چکیده
To allow for accurate calculations of calcium carbonate scaling in highly saline produced waters, we present a comprehensive thermodynamic model based on the electrolyte nonrandom two-liquid (eNRTL) activity coefficient equation aqueous Na+-Ca2+-Cl–-HCO3–-CO32–-CO2 system. The eNRTL binary interaction parameters H2O:(Na+-CO32–) pair, H2O:(Na+-HCO3–) (Na+-Cl–):(Na+-CO32–) and (Na+-Cl–):(Na+-HCO3–) pair are identified this work via regression thermodynamic, calorimetric, phase equilibria experimental data. associated with H2O:(Na+-Cl–) CO2:(Na+-Cl–) H2O:(Ca2+-Cl–) (Na+-Cl–):(Ca2+-Cl–) retrieved from literature. remaining Aspen Plus or set to zero. In addition, solubility product constants Na2CO3•10H2O(s), Na2CO3•7H2O(s), Na2CO3•H2O(s), Na2CO3•NaHCO3•2H2O(s), Na2CO3•3NaHCO3(s), CaCO3(s) is capable accurately calculating all calorimetric properties at temperatures up 473.15 K salt concentrations saturation.
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ژورنال
عنوان ژورنال: Fluid Phase Equilibria
سال: 2022
ISSN: ['0378-3812', '1879-0224']
DOI: https://doi.org/10.1016/j.fluid.2021.113263