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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, 2016
Accepted July 4, 2016

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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구아니딘계 초염기 흡수제에 의한 충진탑에서의 이산화탄소 포집 특성

Carbon Dioxide Absorption in a Packed Column Using Guanidine-based Superbase Solution

최영민 홍연기^† 유정균^1†

Young Min Choi Yeon Ki Hong^† Jong Kyun You^1†

한국교통대학교 화공생물공학과, 27469 충북 충주시 대학로 50 ¹한국에너지기술연구원 그린에너지공정연구실, 34129 대전광역시 유성구 가정로 152

Department of Chemical and Biological Engineering, Korea National University of Transportation, Korea ¹Green Energy Process Laboratory, Korea Institute of Energy Research, 152, Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea

Korean Chemical Engineering Research, October 2016, 54(5), 648-652(5), 10.9713/kcer.2016.54.5.648 Epub 6 October 2016

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Abstract

본 연구에서는 구아니딘계 초염기인 1,1,3,3-테트라메틸 구아니딘(TMG)과 에틸렌 글라이콜로 구성된 비수계 흡수제를 충진탑에 적용하여 이산화탄소 흡수특성을 고찰하였다. 흡수탑은 내경이 1 in이고 높이는 0.6 m이며 탑 내부는 0.16 in × 0.16 in의 규격을 갖는 다공 충진물로 채웠다. 흡수탑에서의 이산화탄소 제거 효율에 대한 흡수제 농도, 조업온도 등의 영향 뿐 아니라 이들이 물질전달 저항에 미치는 영향을 고찰하였다. 이산화탄소에 대한 TMG의 로딩값은 약 α = 1.0 molCO2/molTMG에 달하였으며 이산화탄소가 적게 로딩된 흡수제에서는 총괄 물질전달 계수가 TMG의 농도에 비례하였으나 α = 0.5 이상의 로딩값에서는 총괄 물질전달계수가 오히려 감소하였다. 이는 흡수제의 이산화탄소에 대한 로딩값에 따른 흡수제 점도 증가로 인한 액체상에서의 물질전달 저항 증가로 해석할 수 있다.

The study of CO2 absorption in a packed column by 1,1,3,3-tetramethylguanidine (TMG) dissolved in ethylene glycol is presented. Absorption column of inner diameter 1 in and 0.6 m length was filled with Protruded-packing 0.16 in × 0.16 in. We investigated the effect of operating conditions on overall mass transfer coefficients as well as on CO2 removal efficiency. The loading values reached at about 1.0 molCO2/molTMG. In case of absorbent with lean CO2 loading, the overall mass transfer coefficient was proportional to the concentration of TMG. However, in the range of more than α = 0.5 molCO2/molTMG, the overall mass transfer coefficients decreased with the concentration of TMG. It is due to the increasing of mass transfer resistance in liquid phase as increasing of viscosity at higher loading values.

Keywords

Carbon dioxide Superbase TMG Viscosity Mass transfer coefficient

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