9 replies to this topic

[Odc]

Hi everyone!

 

I'm new to ASPEN and I encounter an issue on my carbon capture using MEA simulation. The simulation goes well if I don't add the reactions (water dissociation, CO2 hydrolysis, amine protonation...ect).

But when I go to the "Component" section, add the species (OH-, H3O+,MEA+...ect), then I go to "Chemistry" and add the reactions there.

I then add the Chemistry ID to the "Method" section. I go to "Simulation" and retrieve the Chemistry ID from all the blocs EXCEPT the absorber.

I run, and I obtain the error message shown in the attached screenshot. I don't get why.

Could you explain me what's wrong with it ?

Thanks a lot!

Best regards 

Attached Files

•  erreur.PNG   53.8KB   1 downloads

Edited by Odc, 29 October 2022 - 11:12 AM.

[latexman]

No screen shot.  Edit your OP, click Use Full Editor, add files under the text window.

[Odc]

Thanks I edited it!

[latexman]

Components MEACO-01 and MEA+ are missing the physical property parameter Aqueous Free Energy of Formation. Check in Properties Mode for red marks that indicate missing/wrong information. Navigate to the red mark locations and see what needs to be done. Use the Help functions.

[Odc]

Thanks for the reply. I went to the property bloc, and the thing is all is blue. There is no red flag next to a component. Is there another fast méthode to add réactions different from what I used ?

[latexman]

I've never experienced this exact error.  I'm going by the errors I've had and fixed.  Copy/paste part of the error message into Aspen Help.  Like "missing parameter" or "Aqueous Free Energy of Formation" or "missing Aqueous Free Energy of Formation" or "missing physical property parameter".  If you don't have an account with AspenTech, register for one.  Then. search Aspentech's online Knowledge Base.  Use their online chat, e-mail them, or call them.

[Odc]

Thank you! I went back to property, and then I went to component, specifications and I retrieve the selection "Retrieve binary and pair parameter" (I thought it might retrieve the free energy values of MEA+ and the other one) .  It seems it managed to reach some values for the previous missing parameters, but it rose another issue (screenshot attached).

Attached Files

•  erreur_2.PNG   16.26KB   0 downloads

Edited by Odc, 30 October 2022 - 09:35 AM.

[Odc]

And if I use all the databanks, here is  the new error. So apaprently it manages to calculate the properties, but there is "CMBAL" failure. Do you have any insights about what CMBAL refers to ? Thanks a lot

Attached Files

•  erreur_ajout_databanks.PNG   45.21KB   0 downloads

Edited by Odc, 30 October 2022 - 09:49 AM.

[Odc]

Hi!

I made some changes to the simulation and it seems the former issue is solved but now I got the error about the stoichiometry you can see on the screen attached. It asks to go and see STOICHIOMETRY/MW'S. Any idea to solve this ?

Thanks for your help!

Attached Files

•  erreur_stoi.PNG   6.01KB   0 downloads

Edited by Odc, 31 October 2022 - 03:29 PM.

[latexman]

My best guess is your water balance and/or stoichiometry if off somewhere.