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Degradation Characteristics of Carbon Dioxide Absorbents with Different Chemical Structures  

Kim, Jun-Han (Green Growth Laboratory, Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO))
Lee, Ji-Hyun (Green Growth Laboratory, Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO))
Jang, Kyung-Ryong (Green Growth Laboratory, Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO))
Shim, Jae-Goo (Green Growth Laboratory, Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO))
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.10, 2009 , pp. 883-892 More about this Journal
Abstract
We evaluated the degradation properties of various alkanolamine absorbents (MEA, AMP, DEA, and MDEA) having different chemical structures for $CO_2$ capture. The degradation of $CO_2$ absorbent in general was known to be caused by oxygen which is in flue gas and by heat source, respectively. To analyze the effect of $CO_2$ and $O_2$ on degree of degradation, we conducted a variety of experiments at $30^{\circ}C$ and $60^{\circ}C$ (oxidative degradation) and $130^{\circ}C$ and $150^{\circ}C$ (thermal degradation), respectively. DEA showed the worst property for oxidative degradation in the presence of oxygen among the alkanolamine absorbents. In the case of thermal degradation, the degradation of absorbent was occurred for most of absorbents at $150^{\circ}C$. Among these absorbents, MEA and DEA gave the worst results. As a result, AMP which is a primary amine and having a steric hindrance showed the best result through the degradation test. But, the degradation of absorbent proceeded easily in the case of DEA which is a secondary amine and having 2 OH groups in terminal position. Consequently, we have evaluated the degree of degradation of various absorbents having different chemical structures to give the basic data for the development of alkanolamine absorbent.
Keywords
Carbon dioxide; Absorbent; Chemical structure; Oxidative degradation; Thermal degradation;
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Times Cited By KSCI : 1  (Citation Analysis)
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