CO2 removal process with amines

[Lailaz]

Hi everyone,

I would like to know what happens in an CO2 removal process with amines when we increase the CO2 concentration at the inlet of the absorption tower. Does the separation efficiency decrease or increase? Can anybody justify it?
Thank you so much.

 

[Aggie87]

If you do not change anything else and the rich amine has not fully approached equilibrium with inlet gas CO2, then the percentage of inlet CO2 absorbed will increase. However, the sweet gas CO2 concentration will also increase if no other correcting changes are implemented.

 

[dcasto]

The CO2 out will rise unless you circulate more amine. At some point there will be to much CO2 and the heat of reaction will drive the temperature up and the reactions will stop

Also it depends on which amine you are talking about

 

[trekshop]

Hi!

This is a nice resource to look at:
Aspen HYSYS Simulation of CO2 Removal by Amine Absorption from a Gas Based Power Plant (PDF file)

I hope that helps.



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