A computational model for the regeneration unit of a monoethanolamine-based (MEA-based) absorption plant for CO2 removal has been developed. The model is developed based on the desire to operate the desorber at higher pressures than normal (> 2 bar). The reason for this was to investigate whether it was possible to operate at pressures where the compressor for CO2 recompression to storage pressures of 100-140 bar could be avoided altogether, or at least where the recompression energy requirement would be significantly reduced. The idea was that adding an inert immiscible component to the desorber would give an independent addition to the pressure and thereby the total pressure Could be increased. The model simulates this three-phase process in order to investigate the effects of adding an immiscible organic component to the unit to control reboiler temperature. MEA was used as an example absorbent. The results show that the desorption process using MEA is very sensitive to the reboiler temperature. The reboiler and desorber column temperatures are reduced significantly as hydrocarbon is added to the system, but unfortunately at the cost of increased reboiler duties. The driving force for desorption using MEA is lowered even though the acid gas is diluted throughout the column. This is due to the strong temperature dependency of the CO2 partial pressure over MEA. Simulations of a hypothetical amine have been performed to investigate whether a Compound with more favorable properties could exist. It was found that, in order for an addition of hydrocarbon not to increase the reboiler heat duty, it Would have to have unrealistic thermodynamic properties and the effect on the absorber operation would be very negative, leading to the conclusion that such a solvent would be impossible to use for postcombustion CO2 removal.