Abstract
Experiments were conducted to study the effect of addition of four weak acids (adipic, suberic, phthalic and sebacic acids) on the regeneration of three types of CO2-loaded rich solvents (Monoethanolamine (MEA), Diethanolamine (DEA) and Methyldiethanolamine (MDEA)). It was found that CO2 could be released faster and in a larger quantity when the amount of acid added to the solvent was increased while other desorption conditions were maintained unchanged. Adipic acid appeared to be more effective than phthalic, suberic and sebacic acids in enhancing solvent regeneration rate. Among the three amines investigated, MEA had the highest CO2 desorption rate, while DEA saved the most energy. The effect of adipic acid residue in the MEA solvent on CO2 absorption was also investigated. The residue acid reduced the absorption capacity of the MEA solvent significantly when the solvent concentration was low and slightly when the concentration was high.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. Aaron and C. Tsouris, Sep. Sci. Technol., Taylor and Francis Inc., 321 (2005).
A. B. Rao and E. S. Rubin, Environ. Sci. Technol., 36, 4467 (2002).
H. Yang, Z. Xu, M. Fan, R. Gupta, R. B. Slimane, A. E. Bland and I. Wright, J. Environ. Sci., 20(1), 14 (2008).
M.R. M. Abu-Zahra, J. P.M. Niederer, P.H.M. Feron and G. F. Versteeg, Int. J. Greenhouse Gas Control, 1, 135 (2007).
R. Sakwattanapong, A. Aroonwilas and A. Veawab, Ind. Eng. Chem. Res., 44, 4465 (2005).
D. Eimer, M. Sjøvoll, N. Eldrup, R. Heyn, O. Juliussen, M. McLarney, O. Swang, New thinking in CO 2 removal, 3rd Nordic Symposium on CO 2, Trondheim (2003).
O. Erga, Ind. Eng. Chem., Fundam., 25, 692 (1986).
B. Feng, M. Du, T. J. Dennis, K. Anthony and M. J. Perumal, Energy Fuels, 24(1), 213 (2010).
S. H. Yalkowsky and Y. He, Handbook of aqueous solubility data, CRC Press, Boca Raton, Fla., 1496 (2003).
I. Kim, K. A. Hoff, E.T. Hessen, T. Haug-Warberg and H. F. Svendsen, Chem. Eng. Sci., 64(9), 2027 (2009).
S. J. Yoon, H. Lee, J. H. Yoon, J.G. Shim, J. K. Lee, B.Y. Min and H. M. Eum, Ind. Eng. Chem. Res., 41(15), 3651 (2002).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Du, M., Feng, B., An, H. et al. Effect of addition of weak acids on CO2 desorption from rich amine solvents. Korean J. Chem. Eng. 29, 362–368 (2012). https://doi.org/10.1007/s11814-011-0184-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-011-0184-4