File → Open → Thermo Data…

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Presentation transcript:

File → Open → Thermo Data… When dealing with concentrated fluids, it’s a good idea to use a thermo dataset utilizing the Pitzer equations. File → Open → Thermo Data… thermo_hmw.tdat is the Harvie-Moller-Weare formalism of the Pitzer equations.

Set the composition of the initial fluid on the Basis pane. 1 kg solvent water plus solutes define seawater Initial fluid is equilibrated with CO2 in the atmosphere

add → Simple → Aqueous… H2O Set up a titration path on the Reactants pane. Simulate evaporation by removing solvent water from the system (react a negative mass) add → Simple → Aqueous… H2O

Minerals precipitate and dissolve during the evaporation of seawater.

Repeat assuming fractionation of the precipitated minerals Config → Stepping… Flow-through option doesn’t allow precipitated minerals to dissolve back into the fluid

Minerals that precipitate are not allowed to dissolve back into the evaporating seawater.