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Kinetic of CO2 absorption and carbamate formation in aqueous solutions of diethanolamine

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Abstract

The absorption rates of CO2 into aqueous solutions of Diethanolamine (DEA) with varying concentrations from 0.2 to 4M and temperature range from 293 to 323 K were measured by using a laboratory stirred reactor. The CO2 partial pressure was varied in a range that the reaction would occur in pseudo first order regime. Experimental data were analyzed and the kinetic parameters associated with the reaction were determined. The activation energy for the deprotonation of the intermediate zwitterion was estimated at about 11.4 kcal/mol. The contribution of carbamate formation to the overall absorbed CO2 was experimentally evaluated and found to be of the order of 100%.

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Authors and Affiliations

  1. School of Chemical and Environmental Engineering, University of Nottingham-Malaysia Campus, Jalan Broga 43500, Semenyih, Selangor Darul Ehsam, Malaysia

    Abdelbaki Benamor, Brahim Si Ali & Mohamed Kheireddine Aroua

  2. Department of Chemical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Brahim Si Ali & Mohamed Kheireddine Aroua

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  1. Abdelbaki Benamor
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  2. Brahim Si Ali
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  3. Mohamed Kheireddine Aroua
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Correspondence to Mohamed Kheireddine Aroua.

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Benamor, A., Ali, B.S. & Aroua, M.K. Kinetic of CO2 absorption and carbamate formation in aqueous solutions of diethanolamine. Korean J. Chem. Eng. 25, 451–460 (2008). https://doi.org/10.1007/s11814-008-0077-3

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  • DOI: https://doi.org/10.1007/s11814-008-0077-3

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