http://creativecommons.org/licenses/by-nc-nd/4.0/Yu, HaiClifford, SarahPuxty, GraemeBurns, RobertMaeder, MarcelLi, Lichun2023-11-012023-11-012017-07-012018-07-23<p>Li, L., Maeder, M., Burns, R., Puxty, G., Clifford, S., & Yu, H. (2017). The Henry Coefficient of CO2 in the MEA-CO2-H2O System. Proceedings of the 13th International Conference on Greenhouse Gas Control Technologies. <em>Energy Procedia, 114, </em>1841-1847. doi: 10.1016/j.egypro.2017.03.1313</p>1876-6102https://doi.org/10.1016/j.egypro.2017.03.1313https://research.avondale.edu.au/handle/123456789/12530268<p>The Henry Coefficient of CO₂ is a fundamental property and crucial for the accurate simulation of the absorption and desorption of CO₂ in MEA solutions related to post combustion capture (PCC). The free CO₂ concentration in amine solutions is very small and is difficult to be measured since it reacts with the solution. The “N₂O analogy” is traditionally applied to estimate the physical solubility of CO₂ based on the assumption that the two gases behave similarly in amine solutions. We propose a direct way to determine Henry Coefficient of CO₂ in MEA solutions as an alternative to N₂O analogy. The method only requires vapor liquid equilibrium measurements of the MEA-CO₂-H₂O system. Based on the total MEA concentration, loading and known equilibrium constants the free CO₂ can be computed which allows the determination of the Henry Coefficient. A 6-parameter polynomial is used to approximate the Henry Coefficient as a function of the total MEA concentration and total CO₂ concentration at 40 ^oC.</p>en-usHenry Coefficient; CO2 absorption; VLE model; MEA solutionConference Publication