Prediction of the temperature dependence of a polyether–water mixture using COSMOtherm

As entry for the 6th industrial fluid property simulation challenge, the COSMO-RS method in its COSMOtherm implementation has been used to predict the mutual solubilities of dipropylene glycol dimethyl ether (DPGDME) and water. The miscibility gaps and their unusual inverse temperature dependence ha...

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Bibliographic Details
Published in:Fluid phase equilibria 2011-11, Vol.310 (1-2), p.7-10
Main Authors: Reinisch, Jens, Klamt, Andreas, Eckert, Frank, Diedenhofen, Michael
Format: Article
Language:English
Subjects:
Deviation
Fluid dynamics
Fluid flow
Fluids
Inverse
Miscibility gap
Temperature dependence
Tuning
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Summary:As entry for the 6th industrial fluid property simulation challenge, the COSMO-RS method in its COSMOtherm implementation has been used to predict the mutual solubilities of dipropylene glycol dimethyl ether (DPGDME) and water. The miscibility gaps and their unusual inverse temperature dependence have been qualitatively correctly predicted with COSMOtherm standard procedure. For quantitative agreement some adjustments based on experimental data at 298K turned out to be necessary. Fine tuning of the water and DPGDME areas led to a good quantitative agreement with experimental data with a maximum deviation of 5.4 mass percent points, which turned out to be the most accurate predictions within all challenge submissions.
ISSN:0378-3812
DOI:10.1016/j.fluid.2011.05.015