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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 11, 2006
Accepted November 3, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Influence of polyethylene oxide on absorption of carbon dioxide into aqueous N-methyldiethanolamine solution

Sang-Wook Park^† Byoung-Sik Choi Jae-Wook Lee¹

Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea ¹Department of Chemical Engineering, Sogang University, Seoul 121-742, Korea

swpark@pusan.ac.kr

Korean Journal of Chemical Engineering, May 2007, 24(3), 431-435(5), 10.1007/s11814-007-0074-y

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Abstract

Carbon dioxide was absorbed into aqueous polyethylene oxide (PEO) solution containing N-methyldiethanolamine (MDEA) in a flat-stirred vessel to investigate the effect of non-Newtonian rheological behavior of PEO on the chemical absorption rate of CO2, where the reaction between CO2 and MDEA was assumed to be a first-order reaction with respect to the concentration of CO2 and MDEA, respectively. A unified correlation equation containing the Deborah number, which reflects the viscoelastic properties of a non-Newtonian liquid, was used to obtain the volumetric liquid-side mass transfer coefficient of carbon dioxide in aqueous PEO solution. The elastic properties of PEO accelerated the absorption rate of CO2 compared with that of a Newtonian liquid based on the same values of viscosity.

Keywords

Absorption Carbon Dioxide Polyethylene Oxide N-Methyldiethanolamine Viscoelastic Liquid

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