On the Responses of Azeotropes to Pressure Variations

Jens Abildskov, John P. O’Connell

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Abstract

Systems with azeotropes cannot be separated by simple distillation since the vapor and liquid compositions are the same. Variation of the applied pressure can shift the azeotropic composition out of the range of purification of a single column or may allow pressure swing operation of two columns. Because of the sensitivity of column size to accurate estimates of the relative volatility, it is important to use reliable phase equilibrium thermodynamics when exploring the possibility of varying pressure to avoid an azeotrope. Based on an analysis of the pressure sensitivity of azeotropic compositions, we show examples of the impact of different modeling strategies for binary and multicomponent mixtures.
Original languageEnglish
Title of host publicationBook of Full Papers - 10th International Conference on Distillation and Absorption 2014
PublisherDECHEMA
Publication date2014
Pages34-39
Publication statusPublished - 2014
Event10th International Conference on Distillation and Absorption - Friedrichshafen, Germany
Duration: 14 Sep 201417 Sep 2014
Conference number: 10

Conference

Conference10th International Conference on Distillation and Absorption
Number10
CountryGermany
CityFriedrichshafen
Period14/09/201417/09/2014

Cite this

Abildskov, J., & O’Connell, J. P. (2014). On the Responses of Azeotropes to Pressure Variations. In Book of Full Papers - 10th International Conference on Distillation and Absorption 2014 (pp. 34-39). DECHEMA.