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.
|Title of host publication||Book of Full Papers - 10th International Conference on Distillation and Absorption 2014|
|Publication status||Published - 2014|
|Event||10th International Conference on Distillation and Absorption - Friedrichshafen, Germany|
Duration: 14 Sep 2014 → 17 Sep 2014
Conference number: 10
|Conference||10th International Conference on Distillation and Absorption|
|Period||14/09/2014 → 17/09/2014|
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.