THE INFLUENCE OF DEEPLY EUTECTIC SOLVENTS WITH GLYCERIN ON THE RELATIVE VOLATILITY OF COMPONENTS IN AN ETHANOL-WATER MIXTURE
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Kazan National Research Technological University
Kazan, Russian Federation
Kazan, Russian Federation
2.
Kazan National Research Technological University
3.
Kazan National Research Technological University
Type:
Article
eLocation:
Status:
Published
Received:
05.08.2025
Accepted:
07.08.2025
Published:
07.08.2025
Language:
Russian
Keywords:
VAPOR-LIQUID PHASE EQUILIBRIUM, EXTRACTIVE DISTILLATION, DES
Abstract (English):
The effect of deep eutectic solvents (DES), a mixture of glycerol with triethanolamine, urea and glucose, on the relative volatility of the components of an aqueous ethanol solution was investigated. Based on the open evaporation method, experimental studies of the vapor-liquid phase equilibrium conditions of the ethanol-water system with the addition of DES were carried out. The behavior of the residual concentration lines shows that the addition of DES increases the relative volatility of ethanol, which leads to its faster depletion in the cube. Modeling of the vapor-liquid phase equilibrium conditions was carried out based on the NRTL model, the results obtained demonstrate good agreement with the results of experimental data. A detailed analysis showed that the deviation between the model predictions and experimental data does not exceed 3.5%, indicating a high reliability of the model. The study of the presented data indicates that the addition of various components to glycerol allows one to purposefully change the relative volatility of ethanol in a water-alcohol mixture. This effect is achieved by forming a complex synergistic effect between all components of the mixture during their mixing. The results obtained during the experiment can be successfully applied in designing a process flow chart for extractive rectification for separating an ethanol-water azeotropic mixture. This technique ensures the production of dehydrated ethanol using DES as an effective separating agent. Modeling the extractive rectification process allows predictive calculations of phase equilibrium parameters for water-alcohol systems in the presence of potential highly efficient extractants.
The effect of deep eutectic solvents (DES), a mixture of glycerol with triethanolamine, urea and glucose, on the relative volatility of the components of an aqueous ethanol solution was investigated. Based on the open evaporation method, experimental studies of the vapor-liquid phase equilibrium conditions of the ethanol-water system with the addition of DES were carried out. The behavior of the residual concentration lines shows that the addition of DES increases the relative volatility of ethanol, which leads to its faster depletion in the cube. Modeling of the vapor-liquid phase equilibrium conditions was carried out based on the NRTL model, the results obtained demonstrate good agreement with the results of experimental data. A detailed analysis showed that the deviation between the model predictions and experimental data does not exceed 3.5%, indicating a high reliability of the model. The study of the presented data indicates that the addition of various components to glycerol allows one to purposefully change the relative volatility of ethanol in a water-alcohol mixture. This effect is achieved by forming a complex synergistic effect between all components of the mixture during their mixing. The results obtained during the experiment can be successfully applied in designing a process flow chart for extractive rectification for separating an ethanol-water azeotropic mixture. This technique ensures the production of dehydrated ethanol using DES as an effective separating agent. Modeling the extractive rectification process allows predictive calculations of phase equilibrium parameters for water-alcohol systems in the presence of potential highly efficient extractants.
Keywords:
VAPOR-LIQUID PHASE EQUILIBRIUM, EXTRACTIVE DISTILLATION, DES
VAPOR-LIQUID PHASE EQUILIBRIUM, EXTRACTIVE DISTILLATION, DES
