A novel method for the search and identification of feasible splits of extractive distillations in ternary mixtures

Reducing process cost and CO2 emissions for extractive distillation by double-effect heat integration and mechanical heat pump

“…For the common azeotropic mixtures special distillation processes are required such as extractive distillation, which is the most applied method in industry together with azeotropic distillation [4]. Thermodynamic insight for extractive distillation allows one to assess which component will be withdrawn as product, what the adequate column configuration is, and whether or not it exists limiting operating parameter in both batch [5,6] and continuous modes [7,8].…”

Review of extractive distillation. Process design, operation, optimization and control

“…ABE = A more volatile than B than E) are displayed in each diagram with the possible achievable product being underlined, like product 'A' in ABE region. Later, several authors showed that the achievable product and the minimum entrainer amount could be inferred from the co-analysis of the residue curve map and univolatility curve location for the continuous extractive distillation process (Wahnschafft and Westerberg, 1993;Knapp and Doherty, 1994;Gmehling and Möllmann, 1998;Brüggemann and Marquardt, 2004;Petlyuk et al, 1999Petlyuk et al, , 2015 and the batch extractive distillation process (Lelkes et al, 1998a,c;Frits et al, 2006;Rodríguez-Donis et al, 2009a;Zhan et al, 2018).…”

CAMD for entrainer screening of extractive distillation process based on new thermodynamic criteria

“…Therefore, shortcut methods have been developed to determine the minimum values of these key operating parameters. The search of the limiting values of the reflux ratio and the entrainer flow rate for continuous operating mode can be done in a systematic fashion by the use of either an algebraic criterion (Levy et al, 1985;Petlyuk and Danilov, 1999;Petlyuk et al, 2015) or of mathematical approaches like bifurcation theory (Knapp and Doherty, 1994), or the combined bifurcation-rectification body method (Brüggemann and Marquardt, 2004). In particular, these methods enable to identify pinch branches.…”

“…For continuous extractive distillation, Kossack et al (2008) used the Rectification Body Method (RBM) for computing pinch branches with a homotopic continuation method. The alternative infinite sharp split method requiring only VLE calculations has been recently proposed to compute these pinches (Petlyuk et al, 2015). For batch extractive distillation, Frits et al (2006) used the interval arithmetic method for determining the limiting operating values for batch operating mode.…”