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DOI: https://doi.org/10.4491/eer.2021.500
Removal of NO by carbon-based catalytic reduction bed loaded with Mn induced by dielectric barrier discharge at low temperature
Fan Gao1, Xingpeng Jin1, Guicheng Wang2, Luying Sun1, Yujie Tan1, Renxi Zhang1, Weixuan Zhao3, Jianyuan Hou1, and Ruina Zhang4
1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Institute of Environmental Science, Fudan University, Shanghai 200433, People’s Republic of China
2Institute of Developmental Biology and Molecular Medicine, and School of Life Sciences Fudan University, 220 Handan Rd., Shanghai 200433, China
3Skshu Paint Co., Ltd., Putian 351100, PR China
4Shanghai Institute for Design & Research on Environmental Engineering, Shanghai 200232, China
Corresponding Author: Renxi Zhang ,Tel: +86-13604041266; +86-15201721351, Fax: +021-65642293; +0355-3383872, Email: zrx@fudan.edu.cn; 15210740032@fudan.edu.cn
Weixuan Zhao ,Tel: +86-13604041266; +86-15201721351, Fax: +021-65642293; +0355-3383872, Email: zrx@fudan.edu.cn; 15210740032@fudan.edu.cn
Received: October 8, 2021;  Accepted: January 5, 2022.
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ABSTRACT
The current paper reports on a newly developed DBD-Mn/FCRB hybrid system to explore the removal of NOx by reduction without adding reducing gas at low temperature (below 80℃). This technology was established with a fixed carbon-based reduction catalytic reduction bed loaded with manganese (Mn/FCRB) induced by dielectric barrier discharge (DBD). The NO conversion and N2 selectivity in the new hybrid system reached 90.9% and 79.9% respectively under 8% oxygen content, 1,200 J/L specific input energy (SIE), which were all higher than in the single DBD and DBD-FCRB systems, respectively. The Mn/FCRB was further characterized before and after activation by SEM, XRD and XPS. The possible reaction pathways of denitration were proposed through three processes based on the experimental results: direct denitration of active carbon atoms excited by plasma, reduction by adsorptive C(N) and C(O) complexes on the FCRB surface, and the reaction of nitrogen oxides with by-product CO. In addition, the results also showed that the new in-situ reduction denitration system had strong oxygen shock resistance and water resistance.
Keywords: Dielectric barrier discharge | Fixed carbon-based reduction bed | Mn-based catalysts | Nitric oxide
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