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Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury

[Image: see text] In this study, a series of Mn-modified HZSM-5 samples were synthesized using the solid-state ion-exchange method, and the effects of the manganese loading amount, calcination temperature, reaction temperature, and gas components on mercury removal efficiency were systematically exp...

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Autores principales: Wang, Haining, Ma, Wei, Yan, Jiangbo, Ye, Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7409247/
https://www.ncbi.nlm.nih.gov/pubmed/32775931
http://dx.doi.org/10.1021/acsomega.0c02877
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author Wang, Haining
Ma, Wei
Yan, Jiangbo
Ye, Dong
author_facet Wang, Haining
Ma, Wei
Yan, Jiangbo
Ye, Dong
author_sort Wang, Haining
collection PubMed
description [Image: see text] In this study, a series of Mn-modified HZSM-5 samples were synthesized using the solid-state ion-exchange method, and the effects of the manganese loading amount, calcination temperature, reaction temperature, and gas components on mercury removal efficiency were systematically explored. Given that the mass ratio of HZSM-5 to KMnO(4) and the calcination and reaction temperatures were set to 10:2.6 and 400 and 150 °C, Hg(0) removal efficiency could reach a peak value of 96.4% when exposed to the flue gas containing 5% O(2) and N(2) as the balance. Among the various gas components, O(2) and NO showed a positive impact on Hg(0) removal; Hg(0) removal efficiency could even reach ca. 100% when O(2) and NO were simultaneously introduced. In contrast, the introduction of SO(2) led to a decline of Hg(0) removal efficiency by ca. 16%. In addition, Hg(0) removal efficiency could still retain ca. 92% of that for the fresh sample after six regeneration and reuse cycles, which is indicative of a satisfactory stability and renewability. Finally, Mars–Maessen mechanisms dominated in the mercury chemical adsorption process.
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spelling pubmed-74092472020-08-07 Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury Wang, Haining Ma, Wei Yan, Jiangbo Ye, Dong ACS Omega [Image: see text] In this study, a series of Mn-modified HZSM-5 samples were synthesized using the solid-state ion-exchange method, and the effects of the manganese loading amount, calcination temperature, reaction temperature, and gas components on mercury removal efficiency were systematically explored. Given that the mass ratio of HZSM-5 to KMnO(4) and the calcination and reaction temperatures were set to 10:2.6 and 400 and 150 °C, Hg(0) removal efficiency could reach a peak value of 96.4% when exposed to the flue gas containing 5% O(2) and N(2) as the balance. Among the various gas components, O(2) and NO showed a positive impact on Hg(0) removal; Hg(0) removal efficiency could even reach ca. 100% when O(2) and NO were simultaneously introduced. In contrast, the introduction of SO(2) led to a decline of Hg(0) removal efficiency by ca. 16%. In addition, Hg(0) removal efficiency could still retain ca. 92% of that for the fresh sample after six regeneration and reuse cycles, which is indicative of a satisfactory stability and renewability. Finally, Mars–Maessen mechanisms dominated in the mercury chemical adsorption process. American Chemical Society 2020-07-27 /pmc/articles/PMC7409247/ /pubmed/32775931 http://dx.doi.org/10.1021/acsomega.0c02877 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Wang, Haining
Ma, Wei
Yan, Jiangbo
Ye, Dong
Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title_full Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title_fullStr Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title_full_unstemmed Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title_short Smart Modification of HZSM-5 with Manganese Species for the Removal of Mercury
title_sort smart modification of hzsm-5 with manganese species for the removal of mercury
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7409247/
https://www.ncbi.nlm.nih.gov/pubmed/32775931
http://dx.doi.org/10.1021/acsomega.0c02877
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