Journal
JOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume 58, Issue 7, Pages 2116-2124Publisher
AMER CHEMICAL SOC
DOI: 10.1021/je400396s
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Funding
- Shell International Exploration and Production B.V.
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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.
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