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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received January 20, 2008
Accepted February 1, 2008

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 unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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이온성액체를 활용한 이산화탄소 회수

CO2 Absorption in Ionic Liquids

정순관^† 김대훈¹ 백일현 이시훈

Soon Kwan Jeong^† Dae Hoon Kim¹ Il Hyun Baek Si Hyun Lee

한국에너지기술연구원 청정석탄 연구센터, 305-343 대전시 유성구 장동 71-2 ¹충주대학교 환경공학과, 380-702, 충청북도 충주시 대학로 72

Clean Coal Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yusung-ku, Daejeon 305-343, Korea ¹Department of Environmental Engineering, Chungju National University, 72 Dahangno, Chungju-si, Chungcheongbuk-do 380-702, Korea

jeongsk@kier.re.kr

Korean Chemical Engineering Research, June 2008, 46(3), 492-497(6), NONE Epub 7 July 2008

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Abstract

기-액 흡수 평형장치에서 이온성액체와 아민수용액의 이산화탄소 흡수특성을 평가하였다. 9가지의 이온성액체와 두 종류의 아민수용액의 이산화탄소 압력에 따른 흡수특성과 시간에 따른 흡수속도를 측정하였다. 이온성액체의 양이온과 음이온을 변화시켜 이산화탄소흡수에대한 이온의 영향을 알아보았다. 아민수용액은 이온성액체보다 높은 이산화탄소 흡수능과 빠른 흡수속도를 보였다. 이온성액체 중에서는 1 bar에서 0.14 molCO2/molIL의 흡수능을 보인 [emim][Tf2N]이 가장 우수한 효율을 보였다. 흡수반응온도가 증가할 수 록 이산화탄소 흡수능은 급격한 감소를 보였다. 이산화탄소 흡수에는 이온성액체의 음이온이 주된 역할을 수행하며 양이온은 부가적인 역할을 수행하는 것으로 판단된다.

The solubility of carbon dioxide in ionic liquids and amine solvents has been investigated in gas-liquid absorption equilibrium reactor. Absorption capacity and kinetics of CO2 with CO2 pressure and absorption time in 9 different ionic liquids and 2 kinds of amine solvents were evaluated. In order to understand the effect of ionic type, we changed the cation or anion of ionic liquids. CO2 absorption capacity and absorption rate of amine solvents were higher than those of ionic liquids. CO2 absorption capacity of [emim][Tf2N], 0.14 mol CO2/mol IL at 1 bar, was the highest among the ionic liquids. CO2 absorption capacity of ionic liquid steeply decreased with increasing temperature. Anion of ionic liquid dominates interaction with CO2 and cation plays secondary role.

Keywords

Carbon Dioxide Ionic Liquid Amine Carbon Dioxide Capture

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