Henry's law is applied to predict solubility of gases in liquids. In the case of saline systems, Henry's constant is supposed to be different at different levels of salinity. I am seeking for correlation(s) or model(s) which predict Henry's constant as a function of Pressure, Temperature, and salinity, especially for Highly Saline systems
Seek keywords salting out and Setschenow constant. The chemical potential of the gas in the gas phase is
muG = mu0 + RTln(KH*p)
KH - Henry's constant, mu0 - potential of a suitable standard state. The respective potential of the gas in the electrolyte solution is
muE= mu0 + RTlnCgas + kS*Cel
kS - Setschenow constant, Cel - electrolyte concentration. At equilibrium,
Cgas = KH*p*exp(-kS*Cel)
Normaly, kS is positive so less gas dissolve in electrolyte solution than in pure water (salting out of the gas they call it). kS depend both on the gas and on the electrolyte. Few gases are known that are in fact salted in. The phenomenon is related mainly to the effect of the gas on the dielectric constant of the solution. Check any electrolyte solution book for more info.
Kind regards
http://srdata.nist.gov/solubility/sol_detail.aspx?goBack=Y&sysID=62_73
You may find the following book on CO2 in seawater useful
https://www.elsevier.com/books/co2-in-seawater-equilibrium-kinetics-isotopes-65/zeebe/978-0-444-50946-8
The Dortmund Data Bank (www.ddbst.com) contains appr. 2500 data sets with gas solubilities in electrolyte Solutions.
You may refer to Shumpe et al. correlation for the 'salting out' effect in aqueous solutions, while the effect of organic solutes can be accounted for by Sechenov correlation.
Reference: A. Shumpe, "Gas solubilities in biomedia", in: Rehm, H. J.; Reed, G. (Eds.), "Biotechnology", Vol. 2, Chap. 10, VCH, Weinheim (Germany), 1985. For a modelling application you can additionally check: Carlos Manuel Gomes de Araújo Queirós, Controlo do Oxigénio Dissolvido em Fermentadores para Minimização de Energia Consumida, MSc Thesis, Instituto Superior Técnico, Universidade Técnica de Lisboa (Lisbon), 1997, pp. 13-16 and references therein (in Portuguese).
Thesis Controlo do Oxigénio Dissolvido em Fermentadores para Minimi...
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