Abstract
Fly ash consists of various metal oxides which can remove SO2 gas by the catalyst effect. When fly ash is added in the preparation process of pitch-based activated carbon, the pitch particles aggregate and fly ash is embedded in the activated carbon. To increase SO2 gas removal performance, activated carbon was prepared by surface-treated fly ash and petroleum-based pitch. Carboxyl groups were introduced into the fly ash by malic acid treatment. The introduced carboxyl groups acted as an activation agent to create micropore around the fly ash, and created micropores were exposed to the fly ash outside of the activated carbon. The exposed fly ash increased removal amount of SO2 gas by a catalytic effect of the metal oxides. The SO2 gas removal performance improved by 34% because of the catalyst effect of the exposed fly ash and improvement in the micropore structure in the activated carbon.
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Acknowledgements
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (no. 20181110200070, Functional porous composite for mitigating air pollutant by using coal combustion products) and also supported by the Korea Research Institute of Chemical Technology (KRICT) [no. KK1913-10, Fabrication of petroleum pitch-based carbon absorbent for removal of hazardous air pollutants (SOx/NOx)].
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Kim, M.I., Im, J.S., Seo, S.W. et al. Preparation of pitch-based activated carbon with surface-treated fly ash for SO2 gas removal. Carbon Lett. 30, 381–387 (2020). https://doi.org/10.1007/s42823-019-00107-y
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DOI: https://doi.org/10.1007/s42823-019-00107-y