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Received October 19, 2019
Accepted February 6, 2020
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 magnesium loading on ammonia capacity and thermal stability of activated carbons

Korea Institute of Industrial Technology, 89, Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si Chungcheongnam-do 31056, South Korea 1Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, South Korea 2Korea Institute of Energy Research, 140, Yuseong-daero, 1312 beon-gil, Yuseong-gu, Daejeon 34101, South Korea 3Department of Chemical Engineering Education, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, South Korea
Korean Journal of Chemical Engineering, June 2020, 37(6), 1029-1035(7), 10.1007/s11814-020-0508-3
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Abstract

Mg-loaded activated carbons were prepared by adding various amounts of Mg (1 to 20 wt%) via ultrasonic- assisted impregnation to investigate the effects on the adsorption and desorption characteristics of ammonia. Mgloaded activated carbons were characterized by TGA, BET, SEM, EDS mapping, and NH3-TPD analysis. Mg was homogeneously dispersed on the activated carbon and NH3-TPD analysis confirmed improved desorption and thermal stability for the 10 wt% Mg sample, named AC-Mg(10). AC-Mg(10) retained the highest desorption for five cycles and showed average desorption amount of 0.788mmol NH3/g. During the breakthrough analysis, the AC-Mg(10) showed an initial ammonia adsorption capacity of 0.81mmol NH3/g and average adsorption capacity of 0.69mmol NH3/g over 30 adsorption and desorption cycles.

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