Effect of addition of weak acids on CO2 desorption from rich amine solvents

Min Du; Bo Feng; Hui An; Wenqiang Liu; Li Zhang

Korean Journal of Chemical Engineering, Vol.29, No.3, 362-368, March, 2012

DOI10.1007/s11814-011-0184-4 Export Citation

Effect of addition of weak acids on CO2 desorption from rich amine solvents

Min Du^{1, 2}, Bo Feng^{3, †}, Hui An³, Wenqiang Liu³, and Li Zhang²

¹Maritime College, Chongqing JiaoTong University, Chongqing 400074, China
²School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
³School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia, Qld 4072, Australia

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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.

Keywords:CO2 Absorption;pH Swing;Solvent;CO2 Desorption

[References]

Aaron D, Tsouris C, Sep. Sci. Technol., Taylor and Francis Inc., 321 (2005)
Rao AB, Rubin ES, Environ. Sci. Technol., 36, 4467 (2002)
Yang H, Xu Z, Fan M, Gupta R, Slimane RB, Bland AE, Wright I, J. Environ. Sci., 20(1), 14 (2008)
Abu-Zahra MRM, Niederer JPM, Feron PHM, Versteeg GF, Int. J. Greenhouse Gas Control., 1, 135 (2007)
Sakwattanapong R, Aroonwilas A, Veawab A, Ind. Eng. Chem. Res., 44(12), 4465 (2005)
Eimer D, Sjøvoll M, Eldrup N, Heyn R, Juliussen O, McLarney M, Swang O, New thinking in CO2 removal, 3rd Nordic Symposium on CO2, Trondheim (2003)
Erga O, Ind. Eng. Chem., Fundam., 25, 692 (1986)
Feng B, Du M, Dennis TJ, Anthony K, Perumal MJ, Energy Fuels., 24(1), 213 (2010)
Yalkowsky SH, He Y, Handbook of aqueous solubility data, CRC Press, Boca Raton, Fla., 1496 (2003)
Kim I, Hoff KA, Hessen ET, Haug-Warberg T, Svendsen HF, Chem. Eng. Sci., 64(9), 2027 (2009)
Yoon SJ, Lee H, Yoon JH, Shim JG, Lee JK, Min BY, Eum HM, Ind. Eng. Chem. Res., 41(15), 3651 (2002)

[1] Aaron D, Tsouris C, Sep. Sci. Technol., Taylor and Francis Inc., 321 (2005)

[2] Rao AB, Rubin ES, Environ. Sci. Technol., 36, 4467 (2002)

[3] Yang H, Xu Z, Fan M, Gupta R, Slimane RB, Bland AE, Wright I, J. Environ. Sci., 20(1), 14 (2008)

[4] Abu-Zahra MRM, Niederer JPM, Feron PHM, Versteeg GF, Int. J. Greenhouse Gas Control., 1, 135 (2007)

[5] Sakwattanapong R, Aroonwilas A, Veawab A, Ind. Eng. Chem. Res., 44(12), 4465 (2005)

[6] Eimer D, Sjøvoll M, Eldrup N, Heyn R, Juliussen O, McLarney M, Swang O, New thinking in CO2 removal, 3rd Nordic Symposium on CO2, Trondheim (2003)

[7] Erga O, Ind. Eng. Chem., Fundam., 25, 692 (1986)

[8] Feng B, Du M, Dennis TJ, Anthony K, Perumal MJ, Energy Fuels., 24(1), 213 (2010)

[9] Yalkowsky SH, He Y, Handbook of aqueous solubility data, CRC Press, Boca Raton, Fla., 1496 (2003)

[10] Kim I, Hoff KA, Hessen ET, Haug-Warberg T, Svendsen HF, Chem. Eng. Sci., 64(9), 2027 (2009)

[11] Yoon SJ, Lee H, Yoon JH, Shim JG, Lee JK, Min BY, Eum HM, Ind. Eng. Chem. Res., 41(15), 3651 (2002)