We report the solubility of carbon dioxide in CaCl 2 (aq) and MgCl 2 (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 CO 2 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 CO 2 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 CaCl 2 (aq) or MgCl 2 (aq) than in the synthetic formation brine at the same molality.

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1 This model is based in Microsoft Excel and does not contain any macros or specific visual basic code. *Manuscript Click here to download Manuscript: China transport paper 10th December 2014.docx Click here to view linked References

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