Separation of isobutyl alcohol and isobutyl acetate by extractive distillation and pressure-swing distillation: Simulation and optimization

2013 ◽  
Vol 118 ◽  
pp. 652 ◽  
Author(s):  
Sanjay Pralhad Shirsat
Keyword(s):  
Extractive Distillation ◽  
Isobutyl Alcohol ◽  
Simulation And Optimization ◽  
Isobutyl Acetate ◽  
Pressure Swing ◽  
Distillation Simulation ◽  
Pressure Swing Distillation

Exergoenvironmental Analysis of Tetrahydrofuran/Ethanol Separation through Extractive and Pressure-Swing Distillation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Patrick Vaz Mangili ◽  
Diego Martinez Prata
Keyword(s):  
Carbon Emissions ◽  
Extractive Distillation ◽  
Exergy Destruction ◽  
Fuel Type ◽  
Ethanol Mixture ◽  
Destruction Rate ◽  
High Boiling Point ◽  
The Difference ◽  
Pressure Swing ◽  
Pressure Swing Distillation

AbstractExtractive distillation uses a high-boiling point solvent for changing the relative volatility of the azeotropic mixture, whereas pressure-swing distillation is based on the difference of operating pressures for such a purpose. In this paper, said separation technologies were applied to a tetrahydrofuran/ethanol mixture and compared with regard to their thermodynamic and environmental performances. The former was assessed by determining the total exergy destruction rate and rational efficiency of each configuration, while the latter was evaluated by estimating their respective indirect carbon emissions. The results showed that the pressure-swing process has not only the lowest exergy destruction rate (383.1 kW) but also the lowest CO2 emission rate (678.7 kg/h), which is mainly due to its lower thermal energy requirements. A sensitivity analysis was then carried out in order to determine how the carbon emissions respond to both the efficiency and the fuel type of the utility boiler.

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.

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