2015
DOI: 10.1002/aic.14825
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Experimental studies and modeling of CO2 solubility in high temperature aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions

Abstract: The phase equilibria of CO2 and aqueous electrolyte solutions are important to various chemical‐, petroleum‐, and environmental‐related technical applications. CO2 solubility in aqueous CaCl2, MgCl2, Na2SO4, and KCl solutions at a pressure of 15 MPa, the temperatures from 323 to 423 K, and the ionic strength from 1 to 6 mol kg−1 were measured. Based on the measured experimental CO2 solubility, the previous developed fugacity‐activity thermodynamic model for the CO2‐NaCl‐H2O system was extended to account for t… Show more

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Cited by 56 publications
(14 citation statements)
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“…At 323 K, the calculated CO 2 solubilities are in excellent agreement with experimental data(Zhao et al 2015b).…”
supporting
confidence: 75%
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“…At 323 K, the calculated CO 2 solubilities are in excellent agreement with experimental data(Zhao et al 2015b).…”
supporting
confidence: 75%
“…The k ij were adjusted to the CO 2 solubility data (Wiebe and Gaddy 1941;Nakayama et al 1987;King et al 1992;Valtz et al 2004;Yan et al 2011;Hou et al 2013;Zhao et al 2015b) in H 2 O and single-electrolyte solutions, including NaCl, KCl, CaCl 2 , MgCl 2 and Na 2 SO 4 . It is worthy to mention that in the fitting process, all k ij for CO 2 -ions interactions were simultaneously adjusted to solubility data in these single-electrolyte solutions in order to have transferrable parameters that can be easily extended to mixed electrolyte solutions and brines.…”
Section: Parameterization and Resultsmentioning
confidence: 99%
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“…As direct mineralization involves the gas‐liquid‐solid three‐phase reaction, the solubility of CO 2 in the suspensions is crucial. This affects not only the CO 2 concentration in the solution but also changes the acidity of the solution . There are many reports on the direct CO 2 mineralization of silicate slag via the introduction of salts, such as sodium chloride or sodium bicarbonate, to enhance the reaction .…”
Section: Introductionmentioning
confidence: 99%