Like other phase equilibria, gas solubilities are strongly affected by electrolyte components in the liquid phase, While in case of physical solutions the Henry coefficient is usually increased (salting out effect), chemical (mostly acid/base) reactions between the gas and dissolved electrolytes can increase the solubility by orders of magnitude. Data for gas solubilities in liquids containing electrolytes are stored in the EGLE data bank.

EGLE contains 1,698 data sets (10,052 data points) for 193 components and 437 different systems (348 ternary, 84 quaternary, and 5 higher systems) (Version 2011).

The following plot shows the effect of sodium nitrate (3) on the solubility of carbon dioxide (1) in water (2) at 40 and 100°C:

The curves in the plot were calculated using the PSRK equation of state combined with the LIFAC electrolyte g^E model. All data were taken from the DDB. It can be seen that at the same total pressure, which is mainly due to the partial pressure of CO₂ in the vapor phase, the liquid CO₂ concentration is strongly reduced with increasing electrolyte concentration in the liquid phase.

Selected Scientific Papers

2006	Modified LIQUAC and Modified LIFAC-A Further Development of Electrolyte Models for the Reliable Prediction of Phase Equilibria with Strong Electrolytes	Kiepe J., Noll O., Gmehling J.	Journal	Ind.Eng.Chem.Res., 45, 7, 2361 2373 (2006)
2004	Application of the PSRK Model for Systems Containing Strong Electrolytes	Kiepe J., Horstmann S., Fischer K., Gmehling J.	Journal	Ind.Eng.Chem.Res., 43, 20, 6607 6615 (2004)
2001	Prediction of Gas Solubilities in Aqueous Electrolyte Systems Using the Predictive Soave-Redlich-Kwong Model	Li J., Topphoff M., Fischer K., Gmehling J.	Journal	Ind.Eng.Chem.Res., 40, 16, 3703 3710 (2001)

Selected Scientific Papers (Experimental Data)

2003	Experimental Determination and Prediction of Gas Solubility Data for Methane + Water Solutions Containing Different Monovalent Electrolytes	Kiepe J., Horstmann S., Fischer K., Gmehling J.	Journal	Ind.Eng.Chem.Res., 42, 21, 5392 5398 (2003)
2002	Experimental Determination and Prediction of Gas Solubility Data for CO2 + H2O Mixtures Containing NaCl or KCl at Temperatures between 313 and 393 K and Pressures up to 10 MPa	Kiepe J., Horstmann S., Fischer K., Gmehling J.	Journal	Ind.Eng.Chem.Res., 41, 17, 4393 4398 (2002)

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