Corr Science

Mixed Solvent Electrolyte (MSE) Model

With the MSE model, OLI has removed the concentration limit. Where the AQ model is valid to a concentration limit of 30 molal ionic strength, The MSE model predicts electrolyte behavior from infinite dilution to molten salts.

The MSE model utilized all prior work on the Helgeson EOS and supporting databank through a conversion of the standard-state chemical potentials provided for aqueous systems. This means that the equilibrium constants and other standard state partial molal thermodynamic properties are readily predicted for mixed solvent environments.

The activity coefficient model is new and is based upon an extended Debye-Huckel term, a Uniquac term, and a middle-range electrolyte term.
Temperature: -50 to 90% of Tcrit of mixture
Pressure: 0 to 1500 bar
Ionic strength: no limit

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