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Received November 16, 2009
Accepted January 12, 2010
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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
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Characterization of metal corrosion by aqueous amino acid salts for the capture of CO2
Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea 1Green Growth Laboratory, Korea Electric Power Research Institute, 65 Munji-ro, Yuseong-gu, Daejon 305-760, Korea
Korean Journal of Chemical Engineering, September 2010, 27(5), 1576-1580(5), 10.1007/s11814-010-0246-z
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Abstract
We investigated the absorption ability of potassium salts of amino acid solutions for carbon dioxide and compared the results with MEA. The corrosion and degradation behavior were investigated in a CO2 absorption process using aqueous potassium salts of glycine and taurine. The experimental parameters varied were the concentration, amino acid type, temperature, CO2 loading, piperazine, and the presence of corrosion inhibitors. The corrosion characteristics of carbon steel were measured with potassium glycinate and potassium taurate solutions over a wide range of concentrations (1.5 to 5.0 M) and temperatures (313.15 to 353.15 K). The corrosion rate was calculated using a weight loss method averaging the results of four specimens. The experimental results indicate that increases in the concentration of the aqueous amino acid salts, solution temperature, CO2 loading, and piperazine concentration accelerate the corrosion rate. In addition, corrosion inhibitors were proven to be effective in controlling corrosion.
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Veawab A, Tontiwachwuthikul P, Bhole SD, Chem. Eng. Commun., 144, 65 (1996)
Veawab A, Tontiwachwuthikul P, Bhole SD, Ind. Eng. Chem. Res., 36(1), 264 (1997)
Austgen DM, Rochelle GT, Xiao P, Chen CC, Ind. Eng.Chem. Res., 28(7), 1060 (1989)
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Nainar M, Veawab A, Energy Procedia., 1(1), 231 (2009)
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Oexmann J, Hensel C, Kather A, International J. Greenhouse Gas Control., 2(4), 539 (2008)
Veawab A, Tontiwachwuthikul P, Chakma A, Ind. Eng. Chem. Res., 40(22), 4771 (2001)
