TY - JOUR
T1 - Deep eutectic solvents as entrainers in extractive distillation – A review
AU - Neubauer, Maximilian
AU - Wallek, Thomas
AU - Lux, Susanne
N1 - Funding Information:
Financial support by the Austrian Research Promotion Agency (FFG) is gratefully acknowledged (FFG project number: 879587 ).
Publisher Copyright:
© 2022 The Authors
PY - 2022/8
Y1 - 2022/8
N2 - One of the most common techniques for separating azeotropes and close-boiling mixtures is extractive distillation, where the relative volatility of the components to be separated is altered by adding an entrainer. In recent years, deep eutectic solvents have emerged as a new class of entrainers in extractive distillation. Similar to the related class of ionic liquids, deep eutectic solvents combine the high separation capability of solid salts with the simple handling of liquids, additionally exhibiting low to negligible vapour pressures and non-flammability. Compared to ionic liquids, deep eutectic solvents offer advantages in terms of toxicity issues but also solvent costs. In this review, the current state of research regarding deep eutectic solvents in extractive distillation spanning from vapour-liquid-equilibrium measurements and thermodynamic modelling of the corresponding systems to general entrainer feasibility considerations and process simulations is presented and critically evaluated. Additionally, future prospects and comments on unresolved issues are provided.
AB - One of the most common techniques for separating azeotropes and close-boiling mixtures is extractive distillation, where the relative volatility of the components to be separated is altered by adding an entrainer. In recent years, deep eutectic solvents have emerged as a new class of entrainers in extractive distillation. Similar to the related class of ionic liquids, deep eutectic solvents combine the high separation capability of solid salts with the simple handling of liquids, additionally exhibiting low to negligible vapour pressures and non-flammability. Compared to ionic liquids, deep eutectic solvents offer advantages in terms of toxicity issues but also solvent costs. In this review, the current state of research regarding deep eutectic solvents in extractive distillation spanning from vapour-liquid-equilibrium measurements and thermodynamic modelling of the corresponding systems to general entrainer feasibility considerations and process simulations is presented and critically evaluated. Additionally, future prospects and comments on unresolved issues are provided.
KW - Azeotropes
KW - Deep eutectic solvents
KW - Extractive distillation
KW - Process simulation
KW - Vapour-liquid-equilibrium measurements
UR - http://www.scopus.com/inward/record.url?scp=85132853970&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2022.06.019
DO - 10.1016/j.cherd.2022.06.019
M3 - Review article
AN - SCOPUS:85132853970
SN - 0263-8762
VL - 184
SP - 402
EP - 418
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
ER -