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Journal article

Improvement of the PR-CPA equation of state for modelling of acid gases solubilities in aqueous alkanolamine solutions

By Wang, Tianyuan1; El Ahmar, Elise1; Coquelet, Christophe1; Kontogeorgis, Georgios M.2,3,4

From

Université PSL1

Department of Chemical and Biochemical Engineering, Technical University of Denmark2

CERE – Center for Energy Ressources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark3

KT Consortium, Department of Chemical and Biochemical Engineering, Technical University of Denmark4

Chemical absorption with alkanolamines processes are commonly applied for natural gas purification. The knowledge of CO2, H2S, hydrocarbons and mercaptans solubilities in aqueous alkanolamine solutions is important in acid gas removal process simulation and design. In previous works, alkanes, aromatics and mercaptans solubilities in different aqueous alkanolamine solutions have been successfully represented by using the PR-CPA EoS.

In this work, the PR-CPA EoS with a pseudo-chemical reaction approach is developed and applied to describe the solubility of acid gases in aqueous alkanolamines solutions. The results are in good agreement with a wide range of experimental data. Other relevant properties such as water content, electrolytes speciation and enthalpy of absorption are accurately predictd by PR-CPA EoS.

Language: English
Year: 2018
Pages: 74-87
ISSN: 18790224 and 03783812
Types: Journal article
DOI: 10.1016/j.fluid.2018.04.019
ORCIDs: 0000-0002-3343-4628 , 0000-0001-6382-673X and Kontogeorgis, Georgios M.
Keywords

Acid gases Alkanolamine CPA Natural gas Solubility

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