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Received April 27, 2007
Accepted July 23, 2007
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Characteristics of absorption and regeneration of carbon dioxide in aqueous 2-amino-2-methyl-1-propanol/ammonia solutions

Department of Environmental Engineering, Pusan National University, Busan 609-735, Korea 1Department of Reduction of Greenhouse Gas, Response to Climate Change, Pohang 790-834, Korea 2Department of Natural Resources, Ministry of Environment, Gwacheon 427-729, Korea 3Sefarfiltech Co., Ulsan 680-810, Korea
kjoh@pusan.ac.kr
Korean Journal of Chemical Engineering, March 2008, 25(2), 279-284(6), 10.1007/s11814-008-0049-7
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Abstract

In this study, the removal efficiency, absorption amount, and loading value of CO2 into aqueous blended 2-amino-2-methyl-1-propanol (AMP)/ammonia (NH3) solutions were measured by using the absorption and regeneration continual process. The effect of adding NH3 to enhance absorption characteristics of AMP was investigated. The performance was evaluated under various operating conditions. As a result, the method of blending AMP and NH3 was not adequate because of a problem with scale formation. Consequently, NH3 of 1, 3, 5, and 7 wt% was added to 30 wt% AMP. Of these additions, 5 wt% NH3 was the optimum concentration because the CO2 removal efficiency and absorption amount were almost 100% and 2.17 kg CO2/kg absorbent, respectively. Also, the scale problem was almost absent. As the regenerator temperature varied from 80-110 ℃, the loading of rich amine was almost constant, but the loading of lean amine was decreased as the regenerator temperature increased. Thus, the optimum regenerator temperature was 110 ℃ in this experiment.

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