The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>

The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>

The goal of the study was to modify activated carbon (AC) with nitrogen groups and ceria and to test the obtained materials in low temperature selective catalytic reduction of nitrogen oxides. For that purpose, the starting AC was oxidized with HNO<sub>3</sub> of various concentrations,...

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Main Authors: Marwa Saad, Agnieszka Szymaszek, Anna Białas, Bogdan Samojeden, Monika Motak
Format: Article
Language:English
Published: MDPI AG 2020-12-01
Series:Catalysts
Subjects:
activated carbon
SCR
ceria
Online Access:https://www.mdpi.com/2073-4344/10/12/1423
id doaj-3b500ccfd7f54e8f8c4b60b9dc8651e4
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spelling doaj-3b500ccfd7f54e8f8c4b60b9dc8651e42020-12-06T00:00:45ZengMDPI AGCatalysts2073-43442020-12-01101423142310.3390/catal10121423The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>Marwa Saad0Agnieszka Szymaszek1Anna Białas2Bogdan Samojeden3Monika Motak4Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, PolandFaculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, PolandFaculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, PolandFaculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, PolandFaculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, PolandThe goal of the study was to modify activated carbon (AC) with nitrogen groups and ceria and to test the obtained materials in low temperature selective catalytic reduction of nitrogen oxides. For that purpose, the starting AC was oxidized with HNO<sub>3</sub> of various concentrations, modified with urea and doped with 0.5 wt.% of Ce. It was observed that the increased concentration of acid influenced the catalytic activity, since textural and surface chemistry of activated carbon was changed. The most active sample was that modified with 14 M HNO<sub>3</sub> and it reached 96% of NO conversion at 300 °C. Additionally, the addition of Ce improved the catalytic performance of modified AC, and NO was reduced according to oxidation–reduction mechanism, characteristic for supported metal oxides. Nevertheless, the samples promoted with Ce emitted significantly higher amount of CO<sub>2</sub> comparing to the non-promoted ones.https://www.mdpi.com/2073-4344/10/12/1423activated carbonSCRceria
collection DOAJ
language English
format Article
sources DOAJ
author Marwa Saad
Agnieszka Szymaszek
Anna Białas
Bogdan Samojeden
Monika Motak
spellingShingle Marwa Saad
Agnieszka Szymaszek
Anna Białas
Bogdan Samojeden
Monika Motak
The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
Catalysts
activated carbon
SCR
ceria
author_facet Marwa Saad
Agnieszka Szymaszek
Anna Białas
Bogdan Samojeden
Monika Motak
author_sort Marwa Saad
title The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
title_short The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
title_full The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
title_fullStr The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
title_full_unstemmed The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH<sub>3</sub>
title_sort enhanced performance of n-modified activated carbon promoted with ce in selective catalytic reduction of nox with nh<sub>3</sub>
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2020-12-01
description The goal of the study was to modify activated carbon (AC) with nitrogen groups and ceria and to test the obtained materials in low temperature selective catalytic reduction of nitrogen oxides. For that purpose, the starting AC was oxidized with HNO<sub>3</sub> of various concentrations, modified with urea and doped with 0.5 wt.% of Ce. It was observed that the increased concentration of acid influenced the catalytic activity, since textural and surface chemistry of activated carbon was changed. The most active sample was that modified with 14 M HNO<sub>3</sub> and it reached 96% of NO conversion at 300 °C. Additionally, the addition of Ce improved the catalytic performance of modified AC, and NO was reduced according to oxidation–reduction mechanism, characteristic for supported metal oxides. Nevertheless, the samples promoted with Ce emitted significantly higher amount of CO<sub>2</sub> comparing to the non-promoted ones.
topic activated carbon
SCR
ceria
url https://www.mdpi.com/2073-4344/10/12/1423
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