Hello guys. Here is all about chemical Engineering and Aspen Hysys..
#PressureSwingDistillation
#EthanolBanzene
Lesson Objectives
*Learn how to use pressure swing to separate a binary mixture that forms an azeotrope into two pure components
An azeotrope occurs when the liquid and vapor mole fractions of each component are the same. Azeotropes present challenges to separation processes and need to be accounted for in process design and operation. No further enrichment can occur in either phase when the system reaches the azeotrope constraint because the driving force is eliminated. A mixture will separate towards a pure component and the azeotropic mixture. The component which is purified depends on which side of the crossover the initial mixture is. To purify the minority component, you must first cross the azeotrope. This can be done by adding an entrainer, another chemical which breaks the azeotrope. This creates the need for additional separation and usually material recycle with a purge stream. Alternatively, the composition of the azeotrope is dependent on pressure, which can be exploited to get the mixture across the azeotrope. This is called pressure swing distillation.
Ethanol and benzene form an azeotrope and the azeotropic composition is sensitive to pressure. Therefore, it is
possible to use pressure swing to separate this binary mixture into pure components.
Pressure swing distillation can be a good method for separating a binary mixture that forms an azeotrope when:
* The azeotropic composition is sensitive to a pressure change
* The relative volatility of the two components is large except at the azeotropic point
This aspen tutorial for beginners and we learn about process simulation.. This course is very help for Chemical process Engineer and plant design or we can
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