- Title
- The Henry coefficient of CO₂ in the MEA-CO₂-H₂O system
- Creator
- Li, Lichun; Maeder, Marcel; Burns, Robert; Puxty, Graeme; Clifford, Sarah; Yu, Hai
- Relation
- 13th International Conference on Greenhouse Gas Control Technologies (GHGT-13). Proceedings of the 13th International Conference on Greenhouse Gas Control Technologies [presented in Energy Procedia, Vol. 114] (Lausanne, Switzerland 14-18 November, 2016) p. 1841-1847
- Publisher Link
- http://dx.doi.org/10.1016/j.egypro.2017.03.1313
- Publisher
- Elsevier
- Resource Type
- conference paper
- Date
- 2017
- Description
- 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 °C.
- Subject
- Henry coefficient; CO₂ absorption; VLE model; MEA solution
- Identifier
- http://hdl.handle.net/1959.13/1396086
- Identifier
- uon:33987
- Identifier
- ISSN:1876-6102
- Rights
- © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
- Language
- eng
- Full Text
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