Lecture #15:- Azeotropic Mixture Distillation Using Pressure Swing (Aspen Hysys)

Hello guys. Here is all about chemical Engineering and Aspen Hysys..
#PressureSwingDistillation
#AzeotropeMixtureDistillation
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 water form an azeotrope at approximately 95.5mol-% ethanol at 1 atm. This is a low-boiling point (or positive) azeotrope. The boiling point of the mixture is lower than either of the pure components, so the
azeotropic mixture exit from the top of the column regardless of which compound is being enriched in the bottoms.
The azeotrope in the ethanol-water system presents a barrier to separation, but pressure swing distillation can be used to purify ethanol. A technically feasible design for purifying ethanol to 99mol-% with pressure swing distillation can be constructed using Aspen HYSYS. A column with 30 equilibrium stages and operating at 0.1 bar with a reflux ratio of 6.9 increases the ethanol composition to 90mol-%. A second column with 75 equilibrium stages and operating at 20 bar with a reflux ratio of 10.8 increases the purity to 99mol-%.
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[@nisarahmed-el3lh]

So nice

[@learningforlearners8017]

❤️

[@kalashpai3712]

Great lecture

[@learningforlearners8017]

Thanks ❤️

[@krishnarathod9401]

Can you make a tutorial on the mass and energy balance for this?

[@ghulamhaider1716]

Nice sir

[@learningforlearners8017]

Thanks

[@nizakatali612]

Very good

[@javadmousavy3377]

احسنت

[@dianasujeymamanichuquina7430]

in the valve, how do I turn it so that the outlet is on the left side and the inlet is on the right?

[@sameergangrekar]

I have seen Six distillation Column. No where pressure in Condenser and reboiler is same. There has to be some pressure drop across coloum.

[@learningforlearners8017]

For steady state case we do but in dynamic mood you are right

[@sameergangrekar]

In dynamic mode we become crazy, plant doesn't work according to our simulation.

[@learningforlearners8017]

Simulation shows approximations of the plant but real life have different problems which can not be simulate

[@epurivenkatavinay4946]

Sir, do you have biogas simulink model using anaerobic digestion?

[@AhmadRaza-qu1hu]

How to do simulation on a gasifier?Can you make a video on this topic?

[@learningforlearners8017]

Ok sir your topic noted soon video will be uploaded

[@AhmadRaza-qu1hu]

@@learningforlearners8017 thanks in advance

[@learningforlearners8017]

My pleasure