Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Solubility of CO2 in Aqueous Solutions of CaCl2 or MgCl2 and in a Synthetic Formation Brine at Temperatures up to 423 K and Pressures up to 40 MPa

Tong, D.[Danlu], Martin Trusler, J. P., Vega-Maza, D.[David]
J. Chem. Eng. Data 2013, 58, 7, 2116-2124
ABSTRACT
We report the solubility of carbon dioxide in CaCl2(aq) and MgCl2(aq) at molalities of (1, 3, and 5) mol*kg 1, temperatures of (308 to 424) K and pressures up to 40 MPa. We also report the solubility of CO2 in a synthetic formation brine containing 0.910 mol*kg 1 NaCl and 0.143 mol*kg 1 KCl over the same ranges of temperature and pressure. The expanded uncertainties at 95 % confidence are 0.03 K in temperature, between (0.08 and 0.15) MPa in bubble pressure and 0.00015 in the mole fraction of CO2 in the solution at its bubble point. The results show a strong salting-out effect, whereby the solubility declines with increasing molality of salt, which is some (20 to 30) % greater in CaCl2(aq) or MgCl2(aq) than in the synthetic formation brine at the same molality.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 H2O water
3 CaCl2 calcium chloride
4 Cl2Mg magnesium chloride
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • PVT analysis
  • 5
  • POMD
  • 1
  • 2
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Molality, mol/kg - 3; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 36
  • POMD
  • 1
  • 2
  • 4
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Molality, mol/kg - 4; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 39