OLI Studio Frequently Asked Questions - FAQ

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Frequently asked questions about OLI Studio (including Stream Analyzer, Corrosion Analyzer, Scalechem and EVS)

ScaleChem

Which thermodynamic framework is more accurate for ScaleChem calculations?

The answer to this is "Depends." Starting with version 9.6.1 we developed the MSE-SRK thermodynamic framework. This was specifically developed for light hydrocarbons at high pressure. The link to MSE-SRK explains in great detail why this framework was developed.

For most ScaleChem type of calculations OLI recommends MSE-SRK. Remember it is only available in versions 9.6.1 or later.

The option to use the MSE vs AQ thermodynamic frameworks depends on several factors. If you have legacy calculations that date back to the ScaleChem - Standard program (which only supported the AQ thermodynamic framework) then you should probably stay with that framework. Otherwise OLI recommends MSE-SRK over just MSE. Of course there are components in MSE that are not in MSE-SRK (such as heavier organic acids) which would mean that you should use MSE instead but these are not typical ScaleChem components.

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