scholarly journals Simulation of the Extractive Distillation using Ethylene Glycol as an Entrainer in the Bioethanol Dehydration

2018 ◽  
Author(s):  
Dhoni Hartanto ◽  
Akhmad Sutrisno ◽  
Viona Widya ◽  
Asalil Mustain ◽  
Prima Astuti Handayani ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Extractive Distillation

scholarly journals Comparative Study of Fluid Package on Extractive Distillation of Ethanol-water Mixture Using Pure Glycerol and Ethylene Glycol as Extracting Solvents

2018 ◽  
pp. 1-12
Author(s):  
O. J. Odejobi ◽  
O. R. Oladokun ◽  
F. J. Ajeigbe
Keyword(s):  
Ethylene Glycol ◽  
Comparative Study ◽  
Feed Rate ◽  
Extractive Distillation ◽  
Base Case ◽  
Water Mixture ◽  
Pure Glycerol ◽  
The Comparative Study ◽  
Separating Agents ◽  
Alternative Designs

The comparative study of Peng Robinson Strygek Vera (PRSV) and Non-Random Two Liquid (NRTL) fluid packages on the extractive distillation of ethanol-water mixture was done using pure glycerol and ethylene glycol as extracting agents. The process was simulated using HYSYS V. 8.4. Pure glycerol and ethylene glycol-glycerol mixture were used as separating agents. The results showed the highest molar composition of ethanol in the distillate at the solvent feed rate of 80 kmol/hr when pure glycerol was used with NRTL fluid package. With the PRSV fluid package the highest ethanol in the distillate was obtained at pure glycerol feed rate of 50 kmol/hr. The ethanol fraction in the distillate was decreasing with increasing ethylene glycol and decreasing glycerol in the ethylene glycol-glycerol mixture. The comparative study of the base case and alternative designs showed high ethanol composition in distillate in the range of 99.46 - 99.96% and 99.96 - 99.67% for NRTL and PRSV fluid package, respectively. It was concluded from the study that the PRSV fluid package could save cost of operation because of lower solvent requirement and energy consumption in the reboiler for both the base case and alternative designs.

Study on the Separation of Azeotrope of Tetrahydrofuran-Water Using a Combined Method of Extractive and General Distillation

2013 ◽  
Vol 803 ◽  
pp. 149-152 ◽  
Author(s):  
Zhi Dong Fan ◽  
Xu Bin Zhang ◽  
Lu Yang Zhao ◽  
Wang Feng Cai ◽  
Fu Min Wang
Keyword(s):  
Ethylene Glycol ◽  
Boiling Point ◽  
Mass Fraction ◽  
Azeotropic Distillation ◽  
Extractive Distillation ◽  
Combined Method ◽  
Production Water ◽  
Pressure Swing ◽  
Pressure Swing Distillation

As an important solvent, tetrahydrofuran has broad applications. Due to its process of production, water will be mixed into the product and should be removed. However, tetrahydrofuran will form a minimum boiling azeotrope with water, which has a boiling point of 63.4°C, so general distillation can not separate them. Common methods to solve this include extractive distillation, pressure swing distillation, azeotropic distillation, pervaporation and so on. In this experiment, we coupled extractive distillation and general distillation, selecting ethylene glycol as the extractant, and successfully dehydrated the azeotrope. The mass fraction of water is reduced from 18% to less than 500ppm,which matches the requirement.

scholarly journals Multivariate statistical optimization of the ethanol fuel dehydration process using ionic liquids

2020 ◽  
pp. 35-35
Author(s):  
Cláudia Cavalcanti ◽  
João Queiroz ◽  
Luiz Stragevitch ◽  
de Rodrigues ◽  
Maria Pimentel
Keyword(s):  
Ionic Liquids ◽  
Energy Consumption ◽  
Ethylene Glycol ◽  
Energy Use ◽  
Desirability Function ◽  
Extractive Distillation ◽  
Statistical Technique ◽  
Dehydration Process ◽  
Ethanol Fuel ◽  
Multivariate Statistical

In this work, the ethanol fuel dehydration process was optimized using the Aspen Plus? simulator and a multivariate statistical technique based on the desirability function. The suitability of the ionic liquids 1-methylimidazolium chloride ([Mim][Cl]), 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]), 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) and 1-hexyl-3-methylimidazolium chloride ([Hmim][Cl]), as extractive distillation entrainers, was also evaluated and compared to the conventional solvents, ethylene glycol and cyclohexane. Among the solvents studied, [Mim][Cl] required the lowest energy consumption, about 8% less energy use when compared to the optimized process using ethylene glycol. The multivariate statistical techniques employed were effective in the optimization of the extractive distillation processes as the process energy consumption could be minimized while achieving ethanol purity in agreement with the current specifications as well as obtaining a high solvent recovery. With the desirability approach it was possible to improve the process performance with little or no modification of existing processing plants.

scholarly journals Simultaneous Prediction of the Density and Viscosity of the Ternary System Water-Ethanol-Ethylene Glycol Using Support Vector Machine

2020 ◽  
pp. 68-73
Author(s):  
Ehsan Kianfar
Keyword(s):  
Support Vector Machine ◽  
Ternary System ◽  
Ethylene Glycol ◽  
Physical Property ◽  
Extractive Distillation ◽  
Support Vector ◽  
Viscosity Data ◽  
Machine Model ◽  
Mean Square Errors ◽  
System Water

Ethylene glycol is an organic solvent used in extractive distillation to separate water-ethanol mixtures. An appropriate process description requires accurate physical property data. In this paper, experimental liquid densities and dynamic viscosities of pure ethylene glycol as well as the ternary system water-ethanol-ethylene glycol are presented over a wide temperature range (298.15 to 328.15 K) at atmospheric pressure. Density and viscosity data of the ternary system of water-ethanol-ethylene glycol solutions were obtained from the literature and a support vector machine model was used to predict the density and viscosity of this system. The determination coefficients for density and viscosity of the ternary system of water-ethanol-ethylene glycol are 0.9854 and 0.9892, respectively. The mean square errors of density and viscosity are obtained 4.6572×10-4 and 3.4920×10-4, respectively. The results confirmed that the proposed method can predict the density and viscosity of the ternary system of water-ethanol-ethylene glycol as a function of temperature, using a support vector machine.

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