5 replies to this topic

[Anteus]

Hello,
I am a BSc undergraduate. I am trying to model a CO2 capture with NH3 solvent in AspenPlus. I am trying to model the rate-based absorber part now with a RadFrac column. My problem is that after running the simulation (which runs down smoothly) I get the warning: "Salts will be ignored". And from the results its obvious that it really ignores the salt reaction, which would be very important because the CO2 is bound by the NH4HCO3 salt. (I defined the Chemistry IDs and salt reactions and RadFrac should be able to handle solids) I pretty much tried everything. I would appreciate any help i get.

Thank you.

[Technical Bard]

I assume you are using the ELECNRTL thermo package... Check the settings for the thermo package.

[Anteus]

I assume you are using the ELECNRTL thermo package... Check the settings for the thermo package.

Yes, I am using ELECNRTL.
I guess you cant use RadFrac model in Rate Based simulation when there are salt(solid phase) reactions.
With Equilibrium model you cant really silmulate co2 abosorbtion in aqueous ammonia, its too quick reaction.

[hashbal]

I assume you are using the ELECNRTL thermo package... Check the settings for the thermo package.

Yes, I am using ELECNRTL.
I guess you cant use RadFrac model in Rate Based simulation when there are salt(solid phase) reactions.
With Equilibrium model you cant really silmulate co2 abosorbtion in aqueous ammonia, its too quick reaction.

hey guys i have aquestion about simulating CO2 absorption also but this time using MEA with UniSim..is ther any package i can use aside Amines pty pkg(it isnt licenced on the school's versn of UniSim)..thank You

[Technical Bard]

hey guys i have aquestion about simulating CO2 absorption also but this time using MEA with UniSim..is ther any package i can use aside Amines pty pkg(it isnt licenced on the school's versn of UniSim)..thank You

Not without severe modification of interaction parameters...

[hashbal]

oh thats not kul, i do not even know how to use the simulation software properly talk more modifying parameters...thank you

hey guys i have aquestion about simulating CO2 absorption also but this time using MEA with UniSim..is ther any package i can use aside Amines pty pkg(it isnt licenced on the school's versn of UniSim)..thank You

Not without severe modification of interaction parameters...