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Aspen Plus Air Stripping Problem

#aspen plus

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#1 Yanzi233_

Yanzi233_

    Brand New Member

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Posted 02 August 2022 - 02:05 AM

Hello,

 

I'm trying to stimulate an Ethyl Acetate Air Stripper in Aspen Plus V11, using RadFrac model (PACKABS).

 

I wanted to air strip the Ethyl Acetate in Feed stream, but the Top/Bottom Temperature can't be corresponding to the Actual Temperature.

 

When using RadFrac without condenser and reboiler, the Bottom Temperature will be lower then the inlet air temperature. (< 25)

 

When using RadFrac with reboiler only, the Bottom Temperature will be much higher (>58 ) than the actual temperature in real situation. 

 

Is there any ways to adjust the temperature to match the real situation? Thanks so much for the responses!

 

Ps: Pls see my process and components in the attached files.

 

Attached Files



#2 breizh

breizh

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Posted 02 August 2022 - 03:19 AM

Hi ,

Try to simulate with a smaller quantity of EA , let say half of the quantity .

Using a simple calculator with 2 components (water +EA)  using Henry's law ,  I got a warning saying that the liquid is oversaturated , meaning part of EA will go to the bottom with liquid due to bubbles formation .

I don't have simulator to support .

What about the thermodynamic  package , do you use the right one ?  

 

note : If you have access to youtube channel , you will find examples where Radfrac is used .

 

Hope this is helpful .

Breizh 






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