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

Publication history: Received September 17, 2012
Accepted June 17, 2013

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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Absorption kinetics of carbon dioxide into aqueous ammonia solution: Addition of hydroxyl groups for suppression of vaporization

Soo-Bin Jeon Jong-Beom Seo¹ Hyung-Don Lee Seong-Kyu Kang² Kwang-Joong Oh^†

Department of Environmental Engineering, Pusan National University, 30, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Korea ¹Technical Research Center, Ironmaking Technology Development Team, HyunDai Steel Complany, Dangjin-si, Chungnam 343-711, Korea ²Department of Environmental R&D, BK Environmental Construction, Songjuk-dong, Jangan-gu, Suwon 440-803, Korea

kjoh@pusan.ac.kr

Korean Journal of Chemical Engineering, September 2013, 30(9), 1790-1796(7), 10.1007/s11814-013-0105-9

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Abstract

Aqueous ammonia can act as an alternative absorbent for CO2 removal, but it has high volatility and reduces the ammonia concentration. We analyzed the hydroxyl additives 2-amino-2-methyl-1-propanol (AMP), ethylene glycol, and glycerol to reduce the vapor pressure of ammonia solutions. In addition, absorption efficiency groups of aqueous ammonia solutions containing hydroxyl additives were investigated. The results show that the addition of AMP, ethylene glycol, or glycerol to NH3 reduced the vapor pressure of the absorbent by 14.0%, 22.7%, and 75.2%, respectively. The reaction rate constants of aqueous NH3 containing AMP, ethylene glycol, and glycerol additives at 293, 303, 313 and 323 K are given by k2, NH3/AMP=4.565×105 exp(-1396.5/T), k2, NH3/ethylene glycol=1.499×106 exp(-1978.7/T) and k2, NH3/glycerol=7.078×106 exp(-2413.3/T), respectively.

Keywords

Aqueous Ammonia CO2 AMP Ethylene Glycol Glycerol

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