Fe-MOR and Fe-FER as catalysts for abatement of N2O with CH4: in situ UV–vis DRS and operando FTIR study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00576893" target="_blank" >RIV/61388955:_____/24:00576893 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0926337323010032?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0926337323010032?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2023.123360" target="_blank" >10.1016/j.apcatb.2023.123360</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fe-MOR and Fe-FER as catalysts for abatement of N2O with CH4: in situ UV–vis DRS and operando FTIR study

Popis výsledku v původním jazyce

The catalytic reduction of N2O with CH4 in absence or in presence of O2 (CRN2O or SCRN2O) and H2O (hydrothermal conditions) was studied on Fe-MOR and Fe-FER catalysts with similar Al distribution and iron-loading. In N2O decomposition and SCRN2O Fe-FER catalysts were more active than Fe-MOR, whereas in CRN2O the catalysts exhibited similar activity. In situ FTIR and UV–vis spectroscopies of thermally activated catalysts revealed that Fe(II) species are better stabilized in FER than in MOR topology. In the presence of CH4, Fe(III)-oxo species were reduced to Fe(II) in both zeolites and became active sites for the CRN2O process. In SCRN2O the presence of O2 decreased the activity of Fe-MOR due to a partial re-oxidation of the active sites. The addition of H2O to the feed caused a poor and reversible deactivation. Operando FTIR experiments provided insights into the reaction pathways and suggested formaldehyde and formate surface species as intermediates.

Název v anglickém jazyce

Fe-MOR and Fe-FER as catalysts for abatement of N2O with CH4: in situ UV–vis DRS and operando FTIR study

Popis výsledku anglicky

The catalytic reduction of N2O with CH4 in absence or in presence of O2 (CRN2O or SCRN2O) and H2O (hydrothermal conditions) was studied on Fe-MOR and Fe-FER catalysts with similar Al distribution and iron-loading. In N2O decomposition and SCRN2O Fe-FER catalysts were more active than Fe-MOR, whereas in CRN2O the catalysts exhibited similar activity. In situ FTIR and UV–vis spectroscopies of thermally activated catalysts revealed that Fe(II) species are better stabilized in FER than in MOR topology. In the presence of CH4, Fe(III)-oxo species were reduced to Fe(II) in both zeolites and became active sites for the CRN2O process. In SCRN2O the presence of O2 decreased the activity of Fe-MOR due to a partial re-oxidation of the active sites. The addition of H2O to the feed caused a poor and reversible deactivation. Operando FTIR experiments provided insights into the reaction pathways and suggested formaldehyde and formate surface species as intermediates.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF18_053%2F0016922" target="_blank" >EF18_053/0016922: Optimalizace analytických postupů pro diagnostiku environmentálních a biomedicínských procesů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Catalysis B - Environmental

ISSN

0926-3373

e-ISSN

1873-3883

Svazek periodika

342

Číslo periodika v rámci svazku

MAR 2024

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

123360

Kód UT WoS článku

001092610500001

EID výsledku v databázi Scopus

2-s2.0-85174613220