Feb 17, 2020   3:12 p.m. Miloslava
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Final theses

Basic information

Basic information about a final thesis

Type of thesis: Bachelor thesis
Thesis title:Regeneration of ionic liquid used for the separation of azeotropic ethanol - water system
Written by (author): Bc. Tanja Bunevska
Department: Department of Chemical and Biochemical Engineering (ICEE FCFT)
Thesis supervisor: doc. Ing. Elena Graczová, CSc.
Opponent:Ing. Branislav Šulgan
Final thesis progress:Final thesis was successfully defended.

Additional information

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Language of final thesis:English

Slovak        English

Title of the thesis:Regeneration of ionic liquid used for the separation of azeotropic ethanol - water system
Summary:The bachelor thesis is focused on the recovery of the ionic liquid, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, used as a promising solvent for the extractive distillation of an ethanol─water mixture. Achieving high purity of the distillate, extractive distillation is considered as the most suitable separation process for separation of this azeotropic mixture. Theoretical part contains description of thermodynamic properties and used devices, but also a research of all possible ionic liquids that can be used as a solvents in separation of ethanol─water mixture. For regeneration of ionic liquid a vacuum evaporator with falling film was assumed. The main task of work was to test the experimental device to get optimal working conditions, such as: temperature, pressure, volume flow and the purity of recovered solvent. Another part of experimental part were measurements of boiling curves of binary systems containing ionic liquid to provide better thermodynamics description of vapor─liquid equilibrium. Calculated NRTL parameters, were used to predict the t─x,y equilibrium of ternary system ethanol─water─IL. In the computation part, based on these results, a design calculation of the extraction distillation column was made and the optimum parameters of the device were evaluated for the desired product purity. At the end of the computation part, energy consumption in the whole process was evaluated. All calculation results were compared with the results obtained using original NRTL parameters evaluated from published experimental data measured in a very small concentration range. Based on the the different results we pointed out the importance of improving the description of V─L equilibrium of the separated system.
Key words:ionic liquid, solvent regeneration, extractive distillation, vacuum evaporator

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