ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
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Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
Publication history
Received October 29, 2022
Revised December 13, 2022
Accepted December 20, 2022
Acknowledgements
This research was also supported by the Ministry of Environment’s Fine Dust Blind Spots Reduction Program (KEITI No. 2020003060005).
articles 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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Effects of operation conditions on absorption of nitric oxide and sulfur oxide using Fe(II)EDTA2 absorbents

1Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea 2Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea
jbjoo@konkuk.ac.kr
Korean Journal of Chemical Engineering, July 2023, 40(7), 1699-1708(10)
https://doi.org/10.1007/s11814-023-1382-6
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Abstract

bstractWe report simultaneous removal of NO and SO2 by Fe(II)EDTA2 absorbent in a wet absorption system. Effects of various operation parameters, such as Fe(II)EDTA2 concentration, solution volume, NO inlet concentration, and pH of absorption solution on NO absorption in a semi-batch reaction, were investigated. NO loading capacity increased with increasing NO inlet concentration since NO loading capacity was highly influenced by NO inlet concentration. NO loading capacity increased in neutral and alkaline environments compared to that in an acidic one. To evaluate NO absorption performance of practical flue gas components, simultaneous absorption of NO and SO2 in the presence of O2 over Fe(II)EDTA2 was carried out. As a result, when all gas emission components (NO, SO2 and O2) were introduced, simultaneous removal of NO and SO2 was obtained with a high NO loading capacity (ca. 88.8%). Antagonistic effects of both SO2 and O2 played an essential role in the regeneration of Fe(III)EDTA and Fe(II)EDTANO2 to Fe(II)EDTA2 , keeping a neutral pH of absorption solution and resulting in a dramatic improvement in the absorption of NO and SO2.

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