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In relation to this article, we declare that there is no conflict of interest.
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Received October 7, 2013
Accepted January 23, 2014
articles 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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Impact of speciation on CO2 capture performance using blended absorbent containing ammonia, triethanolamine and 2-amino-2-methyl-1-propanol

Department of Environmental Engineering, Pusan National University, San 30, Jangjeon-dong, Busan 609-735, Korea 1Facility Division, Pusan National University, San 30, Jangjeon-dong, Busan 609-735, Korea 2Department of Environmental Engineering, Chungbuk National University, 52 Naesudong-ro, Heungdeok-gu, Cheongju 361-763, Korea 3Department of Environmental R&D, BK Environmental Construction, Songjuk-dong, Jangan-gu, Suwon 440-803, Korea
kjoh@pusan.ac.kr
Korean Journal of Chemical Engineering, July 2014, 31(7), 1237-1245(9), 10.1007/s11814-014-0030-6
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Abstract

In our previous study, a high CO2 absorption rate was achieved using a blended absorbent containing AMP, NH3, and TEA. The species of the blended absorbent was determined in this study using 13C nuclear magnetic resonance (NMR) spectroscopy and a modified Kent-Eisenberg model. The carbamate formation constant was also regressed using the model. Bicarbonate and carbonate ions decrease the absorption efficiency and have a positive effect on CO2 stripping. Carbamate has a negative effect on regeneration; a regeneration temperature of 373 K minimized the energy needed. In conclusion, the prediction equation and NMR analysis provide an easy way of determining carbonate group species and carbamate species concentrations, and this method will be helpful in optimizing CO2 capture with blended _x000D_ absorbents.

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