Carbon dioxide removal by alkanolamines in aqueous organic solvents. A method for enhancing the desorption process

The experimentally determined results have been implemented into the Procede Process Simulator, which has been used to simulate a CO2 removal plant with 90% CO2 removal based on the specification of the flue gas of an 827 MWe pulverized coal fired power plant. A solvent of 3 kmol m−3 MDEA in aqueous methanol solution was considered for conceptual purposes. The results indicatively show a maximum decrease in the reboiler duty of the desorber of about 7.5% at methanol fractions of about 0.06 compared to purely aqueous solutions and a reboiler temperature decrease with increasing methanol fractions. Further experimental results are, however, necessary in order to more precisely simulate CO2 removal processes by alkanolamines in aqueous organic solvents.