4 replies to this topic

[Aziii]

Hi
I would like to simulate co2 absorption with 30% wt MEA in aspen hysys but i have some problems.
I dont have any information about solvent flow or number of stages and i should calculate them.
I need equilibrium data, right?
I found the equilibrium solubility of CO2 in 30% wt MEA at 40°C, but the data are on CO2 loading that means mol co2/mol MEA, not X in equilibrium curve (X means mole ratio of solute to solut-free absorbent in the liquid).
How i can solve that?
Could you help me please?

[Nikolay_]

Hello,

 

Right, but in order to build curve in addition to mol CO2/mol MEA you should have partial pressure of CO2 in each data point.

 

Regards,

Nikolai

[Aziii]

Thank you so much for your answer.
Yes, all data that i found are based on partial pressure of CO2 VS CO2 loading.
For calculating minimum absorbent flow, i need Y Vs X diagram.
I can calculate y and then Y from partial pressure but i dont know how to calculate X from co2 loading

[Nikolay_]

You need take assumption about composition MEA solution that include (MEA, CO2, H2O....) by weight and go to mol via m/Mr. If you know mol CO2/mol MEA you can define mole CO2 in MEA solution (X).

[Tanhieungo]

Difine number state by real plate or number section packing. Then supply detail configuration of tower because with amine system , hysys use detail configuration of tower to calculate