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Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke

The activated coke is a promising support for catalysts, and it is important to study the performance of the activated coke catalyst on the removal of NOx. In the current research, a series of the activated coke-supported Mn–Cu catalysts are prepared by the incipient wetness impregnation method. The...

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Autores principales: Ren, Xusheng, Ou, Zhiliang, Wu, Bang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541122/
https://www.ncbi.nlm.nih.gov/pubmed/34683549
http://dx.doi.org/10.3390/ma14205958
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author Ren, Xusheng
Ou, Zhiliang
Wu, Bang
author_facet Ren, Xusheng
Ou, Zhiliang
Wu, Bang
author_sort Ren, Xusheng
collection PubMed
description The activated coke is a promising support for catalysts, and it is important to study the performance of the activated coke catalyst on the removal of NOx. In the current research, a series of the activated coke-supported Mn–Cu catalysts are prepared by the incipient wetness impregnation method. The effects of the molar ration of Mn/Cu, the content of Mn–Cu, the calcination temperature, and reaction space velocity on NO conversion are investigated, and it was found that the 8 wt.% Mn(0.7)Cu(0.3)/AC had the best catalytic activity when the calcination temperature was 200 °C. The existence of SO(2) caused the catalyst to deactivate, but the activity of the poisoning catalyst could be recovered by different regeneration methods. To uncover the underlying mechanism, BET, XPS, XRD, SEM and FTIR characterizations were performed. These results suggested that the specific surface area and total pore volume of the poisoning catalyst are recovered and the sulfite and sulfate on the surface of the poisoning catalysts are removed after water washing regeneration. More importantly, the water washing regeneration returns the value of Mn(3+)/Mn(4+), Cu(2+)/Cu(+), and O(α)/O(β), related to the activity, basically back to the level of the fresh catalyst. Thus, the effect of water washing regeneration is better than thermal regeneration. These results could provide some helpful information for the design and development of the SCR catalysts.
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spelling pubmed-85411222021-10-24 Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke Ren, Xusheng Ou, Zhiliang Wu, Bang Materials (Basel) Article The activated coke is a promising support for catalysts, and it is important to study the performance of the activated coke catalyst on the removal of NOx. In the current research, a series of the activated coke-supported Mn–Cu catalysts are prepared by the incipient wetness impregnation method. The effects of the molar ration of Mn/Cu, the content of Mn–Cu, the calcination temperature, and reaction space velocity on NO conversion are investigated, and it was found that the 8 wt.% Mn(0.7)Cu(0.3)/AC had the best catalytic activity when the calcination temperature was 200 °C. The existence of SO(2) caused the catalyst to deactivate, but the activity of the poisoning catalyst could be recovered by different regeneration methods. To uncover the underlying mechanism, BET, XPS, XRD, SEM and FTIR characterizations were performed. These results suggested that the specific surface area and total pore volume of the poisoning catalyst are recovered and the sulfite and sulfate on the surface of the poisoning catalysts are removed after water washing regeneration. More importantly, the water washing regeneration returns the value of Mn(3+)/Mn(4+), Cu(2+)/Cu(+), and O(α)/O(β), related to the activity, basically back to the level of the fresh catalyst. Thus, the effect of water washing regeneration is better than thermal regeneration. These results could provide some helpful information for the design and development of the SCR catalysts. MDPI 2021-10-11 /pmc/articles/PMC8541122/ /pubmed/34683549 http://dx.doi.org/10.3390/ma14205958 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ren, Xusheng
Ou, Zhiliang
Wu, Bang
Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title_full Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title_fullStr Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title_full_unstemmed Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title_short Low-Temperature Selective Catalytic Reduction DeNO(X) and Regeneration of Mn–Cu Catalyst Supported by Activated Coke
title_sort low-temperature selective catalytic reduction deno(x) and regeneration of mn–cu catalyst supported by activated coke
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8541122/
https://www.ncbi.nlm.nih.gov/pubmed/34683549
http://dx.doi.org/10.3390/ma14205958
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