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Received October 23, 2018
Accepted January 14, 2019
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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
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Regeneration of commercial SCR catalyst deactivated by arsenic poisoning in coal-fired power plants
Qiang Lu†
Zulfiqar Ali
Hao Tang
Tahir Iqbal
Zulqarnain Arain1
Min-shu Cui
Ding-jia Liu
Wen-yan Li
Yong-ping Yang
National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China 1Department of Energy System Engineering, Sukkur IBA University, Sukkur, Pakistan
qianglu@mail.ustc.edu.cn, qlu@ncepu.edu.cn
Korean Journal of Chemical Engineering, March 2019, 36(3), 377-384(8), 10.1007/s11814-018-0227-9
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Abstract
Arsenic species, which are inevitable components in flue gas from the coal combustion process, will result in severe deactivation of selective catalytic reduction (SCR) catalysts. In this paper, a novel method is proposed to regenerate the arsenic-poisoned commercial V2O5-MoO3/TiO2 catalyst collected from coal-fired power plants, including ammonia washing, H2 reduction, and air calcination. Activity tests indicated that the proposed method could recover the catalyst activity more than 96% of the fresh catalyst. Furthermore, detailed characterizations results indicated that this regeneration method could not only effectively remove the arsenic species, but also recover the active constituents of the catalysts to a considerable level. The proposed method offers a feasible strategy for the regeneration of poisoned commercial SCR catalysts and can effectively reduce the total denitrification cost for coal-fired power plants.
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