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Ethanol Dehydrogenation Aspen Hysys Ver 11 Simulation

student hysys ethanol aspen simulation dehydrogenation acetaldehyde

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#1 marie_02

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Posted 16 June 2021 - 11:22 AM

Hi! I've been trying to simulate four distillation columns for ethanol dehydrogenation using ASPEN Hysys version 11. I've already simulated the distillation columns but whenever I try to recycle it in the feed it won't converge. Can someone help me or give me some hint or guidelines for it to converge. Thank you!

 

 



#2 Bobby Strain

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Posted 16 June 2021 - 02:40 PM

You need to post your flowsheet. The first thing to try is to simulate using a dummy recycle stream without a recycle block. You probably mean dehydration, i.e. water removal.

 

Bobby


Edited by Bobby Strain, 16 June 2021 - 10:33 PM.


#3 marie_02

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Posted 17 June 2021 - 12:50 AM

Thank you sir for the reply. I already tried using a recycle stream and I still can't get the required compositions. Here is the link of what I'm trying to simulate  https://docplayer.ne...rogenation.html


Edited by marie_02, 17 June 2021 - 12:53 AM.


#4 Bobby Strain

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Posted 17 June 2021 - 03:00 PM

Adjust the tolerances of the recycle block. Loosen the requirements until you get a converged solution. Then tighten them.

 

Bobby






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