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Modelling of equilibrium solubility of CO 2 and H 2 S in aqueous diglycolamine ( DGA ) solutions
Author(s) -
Hu W.,
Chakma A.
Publication year - 1990
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450680327
Subject(s) - solubility , chemistry , solubility equilibrium , aqueous solution , equilibrium constant , thermodynamics , chemical equilibrium , acid gas , ethanol , organic chemistry , inorganic chemistry , physics
Abstract Information on acid gas solubility in solvents utilized is needed for the design of gas plants. A mathematical model for the prediction of equilibrium solubility of CO 2 and H 2 S in aqueous 2‐amino‐2‐(ethoxy)ethanol (DGA) solutions is presented. The equilibrium constants, K 1 and K 2 , representing a simple proton transfer reaction and the carbamate formation reaction, respectively, were found to be functions of temperature and free acid gas concentration. In addition, K 2 , was affected by DGA concentration as well. Model predictions agree favourably with experimental data.