7 replies to this topic

[kenny4u]

Hi all

 

I am trying to simulate the recovery of 1 butanol from water in ASPEN HYSYS using a DES defined as a pseudo component. However, I could not get the results of the extract and raffinate phases.

 

I attached here the flowsheet page.

 

Thank you

 recovery of 1 butanol flowsheet.PNG   28.62KB   1 downloads  recovery of 1 butanol.PNG   247.96KB   1 downloads

 

[pmoneysh]

what is DES?  Is it is possible to separate butanol-water mixture without energy consumption? you should let us know the philosophy.

[kenny4u]

Thank you sir for your reply

 

DES is an acronym for deep eutectic solvent. This solvent is the new generation green solvent used to replace the traditional organic solvent in liquid-liquid extraction processes. Liquid-liquid extraction is contemplated for the butanol/water mixture to overcome the energy requirement of a distillation column for the separation. Liquid-liquid extraction can be operated at ambient conditions. 

 

I attach here link to the work I am trying to validate.

 

https://www.scienced...37838122100011X

 

Thank you once again 

[pmoneysh]

I cannot access the paper as I am not in any university. However, some of the common reasons would be: 

Is the  binary interaction parameters available for all the component pairs?

Since the solvent is specified as pseudo-component, was the software able to generate its properties correctly?

I hope you have already tried changing the flowrate of solvent from very high to low. 

Good initial guess of top and bottom tray temperature some times helps to get converged solution.

[kenny4u]

Dear Pmoneysh

 

Thank you for the insight. I checked that Hysys did not estimate the pseudo-component properties correctly. So, I inserted the correct values. 

 

Also, the Hysys estimated binary interaction parameters were not in line with that reported in the paper. But, I could not figure out how to resolve this.

 

Please could you drop your mail? So, I can send you the paper.

 

 

Thank you once again.

[breizh]

Hi Kenny ,

Don't give a chance to spammer to reach your email address , if you need to communicate with someone use the messenger in this forum , label is an envelope ( corner top right)  .I removed your address email from the post

Breizh 

[kenny4u]

Dear Sir.

 

Thank you very much.

 

I understand sir.

[pmoneysh]

Hi Kenny,

I cannot perform the whole simulation as it might take some time. However, in the paper if VLE data is available, you can regress to obtain new sets of  BIPs or enter BIPs manually.