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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 June 2, 2011
Accepted July 26, 2011

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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이산화탄소 흡수제의 화학구조별 반응열량 특성 연구

Analysis of the Heat of Absorption Based on the Chemical Structures of Carbon Dioxide Absorbents

곽노상 이지현 엄용석 김준한 이인영 장경룡 심재구^†

No Sang Kwak Ji Hyun Lee Yong Seok Eom Jun Han Kim In Young Lee Kyung Ryoung Jang Jae-Goo Shim^†

한전전력연구원 녹색성장연구소, 305-760 대전시 유성구 문지로 105

Green Growth Laboratory, KEPCO Research Institute, 105 Munji-Ro,Yuseong-gu, Daejon 305-760, Korea

jgshim@kepri.re.kr

Korean Chemical Engineering Research, February 2012, 50(1), 135-140(6), NONE Epub 2 February 2012

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Abstract

반응열량계를 사용하여 1, 2, 3차 아민 수용액과 이산화탄소의 반응열을 각각 측정하였다. 이를 통해 MEA(monoethanolamine, 1차 아민), EAE(2-(ethylamino) ethanol, 2차 아민), MDEA (N-methyldiethanolamine, 3차 아민) 30wt% 수용액이 40 ℃에서 이산화탄소와 반응시 발생하는 반응열을 측정하고 이를 CO2의 loading ratio에 따라 어떻게 변화하는지 평가하였다. 또한, 입체장애 구조를 가지는 AMP(2-amino-2-methyl-1-propanol, 1차 아민), DEA(diethanolamine, 2차 아민), TEA(triethanolamine, 3차 아민) 30 wt% 수용액의 반응열을 각각 측정하여 입체장애 구조가 반응열에 미치는 영향을 살펴보았다. 그 결과, 흡수제의 입체장애 유무와 관계없이 1차 > 2차 > 3차 아민 순으로 반_x000D_ 응열이 증가함을 확인하였다. 그리고 입체장애 아민이 동일 차수의 비 입체장애 아민보다 상대적으로 반응열이 낮지만 그 차이는 크지 않음을 확인하였다.

In this study, the heats of absorption of CO2 with aqueous solutions of primary, secondary and tertiary amine aqueous solutions were measured in the commercial reaction calorimeter SIMULAR (HEL, UK). The heats of absorption of 30 wt% amine aqueous solutions of MEA (monoethanolamine, primary amine), EAE(2-(ethylamino)ethanol, secondary amine), and MDEA (methyldiethanolamine, tertiary amine) were measured as function of the CO2 loading ratio at 40 ℃, in each case. In addition, the heats of absorption of sterically -hindered amine aqueous solutions of AMP(2-amino-2-methyl-1-propanol, primary amine), DEA(diethanolamine, secondary amine) and TEA(triethanolamine, tertiary amine) were measured to observe the steric hindrance effect. The heat of absorption is high in the following order regardless of the steric hindrance: primary amine > secondary amine > tertiary amine. The heats of absorption of amines having sterically-hindered substituents surrounding nitrogen atoms are relatively low compare to that of sterically-free amines, although the difference is very small.

Keywords

CO2 Capture Chemical Absorption Enthalpy Amine Steric hindrance

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