Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 20, Issue 4, Pages 1486-1492Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.07.036
Keywords
CO2 capture; Absorption; Alkanolamine; Alcohol
Funding
- framework of Research and Development Program of the Korea Institute of Energy Research (KIER) [B3-2421]
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Some alkanolamine-alcohol mixtures separate into a CO2 rich phase and a CO2 lean phase after the absorption of CO2, which makes possible a new approach to CO2 capture. In this study, CO2 absorbent solutions with various concentrations of monoethanolamine (MEA) and diethanolamine (DEA) were prepared by mixing them with alcohol. The CO2 absorption capacities of the alkanolamine-alcohol mixtures were investigated by using a semi-batch reactor at 313 K. The species distributions of the absorbents were identified in order to determine the CO2 absorption mechanism of these solutions. Although the CO2 absorption capacities of the phase transitional absorbents are lower than that of aqueous solutions, we conclude from our experimental results that the phase transitional solutions have the economic advantages, and in particular lower regeneration energies, because only the CO2-rich phase needs to be transported to the stripper. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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