Synthesis of heat‐integrated pressure‐swing azeotropic distillation using a graphical pinch analysis

AIChE Journal ◽  
2021 ◽  
Author(s):  
Heecheon Lee ◽  
Chaeyeong Seo ◽  
Minyong Lee ◽  
Jae W. Lee
Keyword(s):  
Azeotropic Distillation ◽  
Pinch Analysis ◽  
Pressure Swing

scholarly journals Synthesis of Ternary Homogeneous Azeotropic Distillation Sequences: 2. Flowsheet Identification

2013 ◽  
Vol 13 (1) ◽  
pp. 43
Author(s):  
Sutijan Sutijan ◽  
Megan Jobson ◽  
Robin Smith
Keyword(s):  
Classification System ◽  
Ternary Mixture ◽  
Azeotropic Distillation ◽  
Ternary Mixtures ◽  
Boundary Crossing ◽  
New Classification ◽  
Azeotropic Mixtures ◽  
Systematic Methodology ◽  
Pressure Swing ◽  
Pressure Swing Distillation

This paper presents a systematic methodology for flowsheet generation for separating binary azeotropic mixtures using homogeneous azeotropic distillation. A new classification system for ternary mixtures using ‘standard distillation line maps’ defined in Sutijan et al. (2012) is employed. The new characterisation system is able to link candidate entrainers to flowsheet structures which can facilitate the separation. The sequences considered include pressure-swing distillation, two and three-column flowsheets with or without boundary crossing and the use of single and double-feed columns. For a given ternary mixture, suitable flowsheet structures that can facilitate the separation can be automatically identified. The method is illustrated using examples.

Production of Anhydrous Ethanol Using Azeotropic Distillation with Petroleum Cuts or Gasoline Pool

2008 ◽  
Vol 59 (2) ◽  
pp. 231-242
Author(s):  
Florin Oprea ◽  
Ionut Stoica
Keyword(s):  
Energy Consumption ◽  
Thermodynamic Model ◽  
Azeotropic Distillation ◽  
Extractive Distillation ◽  
Anhydrous Ethanol ◽  
Continuous Increase ◽  
Commercial Gasoline ◽  
Per Se ◽  
Pressure Swing ◽  
Pressure Swing Distillation

It is now a fact that biofuels have a certain future, whether it is about �biodiesel� or �bioethanol�. EU intends to impose continuous increase of biofuels proportion in commercial products. Ethanol can be used �per se� in commercial gasoline (in different proportions) or can be used instead of methanol in etherification reaction. In both cases it is necessary to use anhydrous ethanol. There are several drying processes: azeotropic distillation, extractive distillation, pressure swing distillation, and adsorption. Present work proposes azeotropic distillation using like entrainer petroleum cuts or commercial gasoline pool. Finally, anhydrous ethanol contains hydrocarbons in several proportions and can be used like commercial gasoline component. The main advantage of this process is that the separation alcohol-hydrocarbons is not so tight, resulting important reducing of the energy consumption in process. There is used a rigorous thermodynamic model as the results are very trusted.

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.

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