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Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR
In a proof-of-concept study we demonstrate in situ reaction monitoring of DeNO(x)-SCR on proton-conducting zeolites serving as catalyst and gas sensor at the same time. By means of temperature-dependent impedance spectroscopy we found that the thermally induced NH(3) desorption in H-form and in Fe-l...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512116/ https://www.ncbi.nlm.nih.gov/pubmed/23213630 http://dx.doi.org/10.3762/bjnano.3.76 |
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author | Simons, Thomas Simon, Ulrich |
author_facet | Simons, Thomas Simon, Ulrich |
author_sort | Simons, Thomas |
collection | PubMed |
description | In a proof-of-concept study we demonstrate in situ reaction monitoring of DeNO(x)-SCR on proton-conducting zeolites serving as catalyst and gas sensor at the same time. By means of temperature-dependent impedance spectroscopy we found that the thermally induced NH(3) desorption in H-form and in Fe-loaded zeolite H-ZSM-5 follow the same process, while a remarkable difference under DeNO(x)-SCR reaction conditions was found. The Fe-loaded catalyst shows a significantly lower onset temperature, and time-dependent measurements suggest different SCR reaction mechanisms for the two catalysts tested. These results may help in the development of catalysts for the reduction of NO(x) emissions and ammonia consumption, and provide insight into the elementary catalytic process promoting a full description of the NH(3)-SCR reaction system. |
format | Online Article Text |
id | pubmed-3512116 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-35121162012-12-04 Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR Simons, Thomas Simon, Ulrich Beilstein J Nanotechnol Letter In a proof-of-concept study we demonstrate in situ reaction monitoring of DeNO(x)-SCR on proton-conducting zeolites serving as catalyst and gas sensor at the same time. By means of temperature-dependent impedance spectroscopy we found that the thermally induced NH(3) desorption in H-form and in Fe-loaded zeolite H-ZSM-5 follow the same process, while a remarkable difference under DeNO(x)-SCR reaction conditions was found. The Fe-loaded catalyst shows a significantly lower onset temperature, and time-dependent measurements suggest different SCR reaction mechanisms for the two catalysts tested. These results may help in the development of catalysts for the reduction of NO(x) emissions and ammonia consumption, and provide insight into the elementary catalytic process promoting a full description of the NH(3)-SCR reaction system. Beilstein-Institut 2012-09-26 /pmc/articles/PMC3512116/ /pubmed/23213630 http://dx.doi.org/10.3762/bjnano.3.76 Text en Copyright © 2012, Simons and Simon https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Letter Simons, Thomas Simon, Ulrich Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title | Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title_full | Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title_fullStr | Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title_full_unstemmed | Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title_short | Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO(x)-SCR |
title_sort | zeolites as nanoporous, gas-sensitive materials for in situ monitoring of deno(x)-scr |
topic | Letter |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512116/ https://www.ncbi.nlm.nih.gov/pubmed/23213630 http://dx.doi.org/10.3762/bjnano.3.76 |
work_keys_str_mv | AT simonsthomas zeolitesasnanoporousgassensitivematerialsforinsitumonitoringofdenoxscr AT simonulrich zeolitesasnanoporousgassensitivematerialsforinsitumonitoringofdenoxscr |