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Vapor pressures of aqueous KCl and MgCl2 solutions from 273.16 to 643.15K

“…Wang et al [39] showed an equation for the osmotic coefficient at 254-623.15 K. They indicated that their osmotic coefficients show systematic cyclic deviations from the experimental results by Rard and Miller [40] at 298.15 K. Although Holmes et al [36] also exhibits such a feature, Holmes et al [36] agrees with Rard and Miller [40] better than Wang et al [39]. Secondly, Wang et al [39] did not consider the ion association in their treatment even at T 523.15 K. Later, Oscarson et al [10] showed the significant degrees of the ion association at 523.15-623.15 K. Therefore, the equation of Wang et al [39] depends on a model at elevated temperatures. Although Wang et al [39] is more accurate at the intermediate temperatures than Holmes et al [36], the problems at both low-temperature and high-temperature sides prevent the application of their equation.…”

“…These deviations are shown in Figs 10. and 11 for the H 2 O + KCl and the H 2 O + MgCl 2 systems, respectively.…”

“…15-623.15 K with considerations of the ion associations. Later, Oscarson et al [10] determined the ion-interaction parameters for aqueous MgCl 2 solutions at 523.15-623. 15 K with considerations of the ion associations and hydrolysis reactions.…”

“…0.6 molal in both studies. Therefore, the equations of Gillespie et al [9] and Oscarson et al [10] restricted their applicable concentrations. Shibue [11] employed an empirical approach to express the vapor pressures of aqueous NaCl and CaCl 2 solutions partly based on the corresponding state approach.…”

Hydration and contact ion pairing of Ca2+ with Cl− in supercritical aqueous solution

“…Within this uncertainty lies the four-coordinated tetrahedral species that is observed for most of the high-temperature transition metal ion-pair species. Oscarson et al 36 shows the speciation for a 0.25m solu-tion at 350°C. Although the parameters for the Cl − /Ca 2+ interaction are well determined, the Cl − /water interaction has fairly high uncertainties.…”