Prediction of the overall enthalpy of CO2 absorption in aqueous amine systems from experimentally determined reaction enthalpies

The enthalpy of CO2 absorption into a selection of different amine systems has been calculated, based on the measured enthalpy values and calculated CO2 dissolution values. The results are in good agreement with measured values as reported in the literature. Individual reaction contributions to the enthalpy of absorption have been calculated for 30 mass % MEA and 30 mass % MDEA, yielding information that is essential to the efficient and effective development of improved amine systems for CO2 capture.