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

Publication history: Received June 30, 2008
Accepted December 4, 2008

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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Simultaneous absorption of CO2 and SO2 into aqueous AMP/NH3 solutions in binary composite absorption system

Won-Joon Choi Jong-Beom Seo¹ Sang-Won Cho² Sang-Wook Park³ Kwang-Joong Oh^1†

Greenhouse Gas Research Center, Korea Institute of Energy Research, Daejeon 305-343, Korea ¹Department of Environmental Engineering, Pusan National University, Busan 609-735, Korea ²Department of Environmental Chemistry, Korea Polytachnic VII Collage, Changwon 641-772, Korea ³Department of Chemical Engineering, Pusan National University, Busan 609-735, Korea

kjoh@pusan.ac.kr

Korean Journal of Chemical Engineering, May 2009, 26(3), 705-710(6), 10.1007/s11814-009-0118-6

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Abstract

To enhance the absorption rate for CO2 and SO2, aqueous ammonia (NH3) solution was added to an aqueous 2-amino-2-methyl-1-propanol (AMP) solution. The simultaneous absorption rates of AMP and a blend of AMP+NH3 for CO2 and SO2 were measured by using a stirred-cell reactor at 303 K. The process operating parameters of interest in this study were the solvent and concentration, and the partial pressures of CO2 and SO2. As a result, the addition of NH3 solution into aqueous AMP solution increased the reaction rate constants of CO2 and SO2 by 144 and 109%, respectively, compared to that of AMP solution alone. The simultaneous absorption rate of CO2/SO2 on the addition of 1 wt% NH3 into 10 wt% AMP at a pA1 of 15 kPa and pA2 of 1 kPa was 5.50×10^(-6) kmol m^(-2) s^(-1), with an increase of 15.5% compared to 10 wt% AMP alone. Consequently, the addition of NH3 solution into an aqueous AMP solution would be expected to be an excellent absorbent for the simultaneous removal of CO2/SO2 from the composition of flue_x000D_ gas emitted from thermoelectric power plants.

Keywords

Carbon Dioxide Sulfur Dioxide Simultaneous Absorption 2-Amino-2-methyl-1-propanol Ammonia

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