Issues with using the KEMDEA model in Aspen
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The KEMDEA method was used to simulate the process of MDEA absorbing CO2 from dry gas. At an absorption tower pressure of 32 bar and a temperature of 40°C, almost all of the C2, C3, and C4 compounds in the dry gas ended up in the amine-rich liquid at the bottom of the tower, which is impossible in real situations! I wonder, experts, what is the reason? Let’s discuss this together :)
It seems that at this temperature and pressure, C2–C4 have reached a supercritical state; it should be considered as a Henry component, but this has not been applied yet. Does anyone understand this?
Well, I’ll have to handle it myself! Through practice, it turns out that C2–C4 should indeed be defined as Henry components; as a result, there are almost no C2–C4 components in the amine-rich liquid:victory:
Hello, OP. Could you share the file for this simulation? I use this data packet as well, but issues such as uneven quality keep occurring. Thank you
H2S, CO2, C1, and C2 should all be defined as Henry components; there shouldn’t be any problem with that. I use ProMax to calculate the process for MDEA desulfurization; I don’t need to enter these Henry constants manually – the system automatically converts them based on the thermodynamic method chosen, and the results are excellent.