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

Publication history: Received January 2, 2007
Accepted November 5, 2007

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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Mass transfer of carbon dioxide in aqueous colloidal silica solution containing N-methyldiethanolamine

Sang-Wook Park^† Byoung-Sik Choi Seong-Soo Kim¹ Jae-Wook Lee²

Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea ¹School of Environmental Science, Catholic University of Pusan, Busan 609-737, Korea ²Department of Chemical Engineering, Sogang University, Seoul 121-742, Korea

swpark@pusan.ac.kr

Korean Journal of Chemical Engineering, July 2008, 25(4), 819-824(6), 10.1007/s11814-008-0136-9

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Abstract

The absorption rate (RA) of carbon dioxide was measured into an aqueous nanometer sized colloidal silica solution of 0-31 wt% and N-methyldiethanolamine of 0-2 kmol/m3 in a flat-stirred vessel for the various sizes and speeds of at 25 oC and 0.101 MPa to obtain the volumetric liquid-side mass transfer coefficient (kLa) of CO2. The film theory accompanied by chemical reaction between CO2 and N-methyldiethanolamine was used to estimate the theoretical value of absorption rate of CO2. An empirical correlation formula containing the relationship between kLa and rheological property of the aqueous colloidal silica solution was presented. The value of RA in the aqueous colloidal silica solution was decreased by the reduction of kLa due to elasticity of the solution.

Keywords

Absorption N-methyldiethanolamine Carbon Dioxide Silica Viscoelastic Liquid

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