thermodynamic model. aqueous solution containing salt, sodium hydroxide (soda), and hypochlorite in water

[jmacias552]

Hello fellow engineers,

I'm currently working with DWSIM 8.6.5 using the Peng-Robinson (PR) thermodynamic package. I'm encountering difficulties in accurately calculating the density of an aqueous solution containing salt, sodium hydroxide (soda), and hypochlorite in water. I suspect this issue may be due to using an inappropriate thermodynamic model for this system.

Are there any thermodynamic packages available in DWSIM that are better suited for modeling electrolyte solutions, particularly for a system containing these components?

Any guidance on selecting the most appropriate thermodynamic model for this aqueous electrolyte system would be greatly appreciated. Thank you in advance for your expertise!

[DanWBR]

@jmacias552 try the ideal solution property package

[jmacias552]

Thanks Daniel, actually I have already tried but I got the message "The given key is not present in the dictionary". Probably is because I have H2, Cl2 because I am doing ClNa electrolysis.

[DanWBR]

@jmacias552 attach a zipped flowsheet here for me to check, if possible

[jmacias552]

Thanks Daniel, find attached a zip file containing the most relevant streams

Testing Thermo Model.zip