Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts

Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH(3)-temperature programmed desorption (NH(3)-TPD) confirmed the location of K(+) at the ion-exchanged sites. Temperature-programmed oxidation (T...

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Autores principales: Lu, Chenxi, Liu, Taizheng, Shi, Qiaolan, Li, Qian, Xin, Ying, Zheng, Lei, Zhang, Zhaoliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5468242/
https://www.ncbi.nlm.nih.gov/pubmed/28607466
http://dx.doi.org/10.1038/s41598-017-03504-3
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author Lu, Chenxi
Liu, Taizheng
Shi, Qiaolan
Li, Qian
Xin, Ying
Zheng, Lei
Zhang, Zhaoliang
author_facet Lu, Chenxi
Liu, Taizheng
Shi, Qiaolan
Li, Qian
Xin, Ying
Zheng, Lei
Zhang, Zhaoliang
author_sort Lu, Chenxi
collection PubMed
description Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH(3)-temperature programmed desorption (NH(3)-TPD) confirmed the location of K(+) at the ion-exchanged sites. Temperature-programmed oxidation (TPO) reactions showed that K-ZSM-5 decreased ignition tempeatures of soot combustion and increased selectivity to CO(2). The improved activity for soot combustion by increasing K(+)-exchanged amounts via decreasing the Si/Al ratio reinforced the K(+) ions participating in soot combustion. (18)O(2) isotopic isothermal reactions suggested the activation of gaseous oxygen by the K(+) ions. This demonstrated a new appliction of alkali metal exchanged zeolites and the strategy for enhancement of catalytic soot combustion activity.
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spelling pubmed-54682422017-06-14 Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts Lu, Chenxi Liu, Taizheng Shi, Qiaolan Li, Qian Xin, Ying Zheng, Lei Zhang, Zhaoliang Sci Rep Article Potassium (K) ion-exchanged ZSM-5 zeolites were investigated for catalytic soot combustion. X-ray absorption fine-structure (XAFS), Raman, in situ IR and NH(3)-temperature programmed desorption (NH(3)-TPD) confirmed the location of K(+) at the ion-exchanged sites. Temperature-programmed oxidation (TPO) reactions showed that K-ZSM-5 decreased ignition tempeatures of soot combustion and increased selectivity to CO(2). The improved activity for soot combustion by increasing K(+)-exchanged amounts via decreasing the Si/Al ratio reinforced the K(+) ions participating in soot combustion. (18)O(2) isotopic isothermal reactions suggested the activation of gaseous oxygen by the K(+) ions. This demonstrated a new appliction of alkali metal exchanged zeolites and the strategy for enhancement of catalytic soot combustion activity. Nature Publishing Group UK 2017-06-12 /pmc/articles/PMC5468242/ /pubmed/28607466 http://dx.doi.org/10.1038/s41598-017-03504-3 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lu, Chenxi
Liu, Taizheng
Shi, Qiaolan
Li, Qian
Xin, Ying
Zheng, Lei
Zhang, Zhaoliang
Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_full Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_fullStr Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_full_unstemmed Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_short Plausibility of potassium ion-exchanged ZSM-5 as soot combustion catalysts
title_sort plausibility of potassium ion-exchanged zsm-5 as soot combustion catalysts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5468242/
https://www.ncbi.nlm.nih.gov/pubmed/28607466
http://dx.doi.org/10.1038/s41598-017-03504-3
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