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

Publication history: Received August 23, 2023
Accepted August 23, 2023

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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Study of mercury-adsorption behavior in the exhaust gas of KI-impregnated ACF

In-Soo Kang Yo-Seob Shin Byung Chan Kwon No-Kuk Park^† Tae Jin Lee Seung Woo Lee^† Myung Jo Seo¹

School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Korea ¹Micro-one Inc., 368 Yeongok-road, Ibjang-myeon, Seobuk-gu, Cheonan-si, Chungnam 31026, Korea

Korean Journal of Chemical Engineering, January 2020, 37(1), 159-165(7), 10.1007/s11814-019-0430-8

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Abstract

This study examined the selective removal of gaseous mercury contained in combustion flue gas by potassium iodide (KI) loaded on activated carbon fibers (ACF). Activated carbon, such as ACF, although a useful mercury sorbent, shows poor performance in the direct treatment of high-temperature flue-gases because it removes mercury only by physical adsorption. KI can remove mercury at high temperatures via a gas-solid reaction between mercury and adsorbents, and it has been confirmed experimentally that it shows high mercury removal performance in the temperature range of 100-200 °C. On the other hand, KI in the absence of a porous support with a high surface area has low mercury-adsorption removal efficiency. Hence, a high surface area support is needed for adsorption removal. In the present study, mercury contained in combustion exhaust gas could be removed efficiently using KI as an adsorption activity enhancer on an activated carbon fiber (ACF), which provided a high surface area.

Keywords

Mercury Adsorption KI-impregnated ACF High Temperature Hg Removal Incineration Exhaust Gas Treatment

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