Experimental and theoretical study of the solubility of carbon dioxide in aqueous blends of piperazine and N-methyldiethanolamine

In the present study, new experimental equilibrium data are reported on the solubility of carbon dioxide into aqueous solutions of N-methyldiethanolamine (MDEA) and piperazine (PZ) over a wide range of conditions. These data not only include CO 2 solubilities and their corresponding partial pressure...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2010, Vol.42 (1), p.151-163
Main Authors: Derks, P.W.J., Hogendoorn, J.A., Versteeg, G.F.
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemistry
Equation of state
Equilibrium
Exact sciences and technology
General and physical chemistry
N-methyldiethanolamine
Piperazine
Solubility
Solutions
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Summary:In the present study, new experimental equilibrium data are reported on the solubility of carbon dioxide into aqueous solutions of N-methyldiethanolamine (MDEA) and piperazine (PZ) over a wide range of conditions. These data not only include CO 2 solubilities and their corresponding partial pressures, pH, and conductivities, but also a limited number of liquid speciation data obtained using NMR spectroscopy. The present data, and other data reported in the literature, were correlated with the Electrolyte Equation of State, as originally introduced by Fürst and Renon. The final model was able to describe the thermodynamics of the quaternary CO 2 –PZ–MDEA– H 2 O reasonably well over a wide range of experimental conditions.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2009.07.025