I'm new to the forum and apologise if this topic has already been covered.
I am an MEng student simulating an amine system in HYSYS for CO2 capture from natural gas powerstation flue gas.
I aim to capture >90 mol % using 30 wt % MEA. I have a converged amine system simulation but I am only capturing around 25%. The system must be designed to operate at low pressure (mainly atmospheric), I am having problems with the absorption column operating at atmospheric pressure, I am losing 75% of the CO2 via the top product, some details are below:
Inlet: 35oC, 1.014 bara, 560 kg/s, 4.7 mol % co2
Lean amine recycle: 40oC, 1.014
Lean amine loading: 0.05
Rich amine loading: 0.37
I also have a temperature cross across the column.
I have attached a doc detailing some stream data around the column.
Any advise/ help would be much appreciated.
Thanks in advance