Utilization of electrochemical treatment and surface reconstruction to achieve long lasting catalyst for NOx removal.

Sharif, HMA; Mahmood, A; Djellabi, R; Cheng, H-Y; Dong, H; Ajibade, FO; Ali, I; Yang, B; Wang, A-J

Utilization of electrochemical treatment and surface reconstruction to achieve long lasting catalyst for NOx removal.

Sharif, HMA Mahmood, A

Djellabi, R Cheng, H-Y Dong, H Ajibade, FO Ali, I Yang, B Wang, A-J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Hazardous Materials, 2021, 401, pp. 1-9
Issue Date:: 2021-01-05

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Field	Value	Language
dc.contributor.author	Sharif, HMA
dc.contributor.author	Mahmood, A https://orcid.org/0000-0001-6438-438X
dc.contributor.author	Djellabi, R
dc.contributor.author	Cheng, H-Y
dc.contributor.author	Dong, H
dc.contributor.author	Ajibade, FO
dc.contributor.author	Ali, I
dc.contributor.author	Yang, B
dc.contributor.author	Wang, A-J
dc.date.accessioned	2022-06-17T05:34:09Z
dc.date.available	2020-07-05
dc.date.available	2022-06-17T05:34:09Z
dc.date.issued	2021-01-05
dc.identifier.citation	Journal of Hazardous Materials, 2021, 401, pp. 1-9
dc.identifier.issn	0304-3894
dc.identifier.issn	1873-3336
dc.identifier.uri	http://hdl.handle.net/10453/158231
dc.description.abstract	The development of catalysts has seen tremendous growth recently but most strategies only report utilization of catalysts for a few initial cycles without taking into account the influence of oxygen poisoning. Here, the magnetic Fe3O4@EDTA-Fe (MEFe, having a core Fe3O4 particle with EDTA-Fe coating) was investigated as a model catalyst for long-term recycling for the removal of nitrogen oxide (NOx) from NO/O2 mixture, followed by N2O recovery. The concentration of oxygen in the flue gas was found to have a strong impact on NOx absorption and catalytic response. To circumvent the oxygen poisoning, the MEFe was subjected to electrochemical treatment in the presence of neutral red (N.R.) and NO removal efficiency was ∼95 % noted. Furthermore, the surface of the catalyst degraded significantly (p < 0.05) after 6-7 repetitive cycling due to surface catalytic reactions, surface poisoning, oxidation of metallic species as well as residual stresses. The MEFe surface was reconstructed after 7 cycles using EDTA solution and Fe source to achieve similar surface coating as the fresh MEFe catalyst. The reconstructed MEFe exhibited similar NOx absorption capability as the fresh MEFe and the reconstruction loop was repeated several times to achieve long term cycling, which make the catalyst cost-effective. Hence, it is proposed that a successful regeneration process can be employed for promising, sustainable and long-lasting catalytic treatment of air pollutants.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Hazardous Materials
dc.relation.isbasedon	10.1016/j.jhazmat.2020.123440
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 05 Environmental Sciences, 09 Engineering
dc.subject.classification	Strategic, Defence & Security Studies
dc.title	Utilization of electrochemical treatment and surface reconstruction to achieve long lasting catalyst for NOx removal.
dc.type	Journal Article
utslib.citation.volume	401
utslib.location.activity	Netherlands
utslib.for	03 Chemical Sciences
utslib.for	05 Environmental Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-06-17T05:34:06Z
pubs.publication-status	Published
pubs.volume	401

Abstract:

The development of catalysts has seen tremendous growth recently but most strategies only report utilization of catalysts for a few initial cycles without taking into account the influence of oxygen poisoning. Here, the magnetic Fe3O4@EDTA-Fe (MEFe, having a core Fe3O4 particle with EDTA-Fe coating) was investigated as a model catalyst for long-term recycling for the removal of nitrogen oxide (NOx) from NO/O2 mixture, followed by N2O recovery. The concentration of oxygen in the flue gas was found to have a strong impact on NOx absorption and catalytic response. To circumvent the oxygen poisoning, the MEFe was subjected to electrochemical treatment in the presence of neutral red (N.R.) and NO removal efficiency was ∼95 % noted. Furthermore, the surface of the catalyst degraded significantly (p < 0.05) after 6-7 repetitive cycling due to surface catalytic reactions, surface poisoning, oxidation of metallic species as well as residual stresses. The MEFe surface was reconstructed after 7 cycles using EDTA solution and Fe source to achieve similar surface coating as the fresh MEFe catalyst. The reconstructed MEFe exhibited similar NOx absorption capability as the fresh MEFe and the reconstruction loop was repeated several times to achieve long term cycling, which make the catalyst cost-effective. Hence, it is proposed that a successful regeneration process can be employed for promising, sustainable and long-lasting catalytic treatment of air pollutants.

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http://hdl.handle.net/10453/158231