Journal
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume 34, Issue 3, Pages 783-787Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.5012/bkcs.2013.34.3.783
Keywords
Carbon dioxide; Absorption; Alkanolamine; Heat of reaction
Categories
Funding
- Energy & Resource R&D program under the Ministry of Knowledge Economy, Republic of Korea [201020102006A-11-2-500]
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The separation and capture process of carbon dioxide from power plants is garnering interest as a method to reduce greenhouse gas emissions. In this study, aqueous alkanolamine solutions were studied as absorbents for CO2 capture. The solubility of CO2 in aqueous alkanolamine solutions was investigated with a continuous stirred reactor at 313, 333 and 353 K. Also, the heat of absorption (-Delta H-abs) between the absorbent and CO2 molecules was measured with a differential reaction calorimeter (DRC) at 298 K. The solubility and heat of absorption were determined at slightly higher than atmospheric pressure. The enthalpies of CO2 absorption in monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), and 2-amino-2-methyl-1-propanol (AMP) were 88.91, 70.44, 44.72, and 63.95, respectively. This investigation showed that the heat of absorption is directly related to the quantity of heat for absorbent regeneration, and is dependent on amine type and CO2 loading.
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