Unprecedented propane?SCR-NOx activity over template-free synthesized Al-rich Co-BEA* zeolite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F15%3A00450878" target="_blank" >RIV/61388955:_____/15:00450878 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jcat.2015.10.007" target="_blank" >http://dx.doi.org/10.1016/j.jcat.2015.10.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcat.2015.10.007" target="_blank" >10.1016/j.jcat.2015.10.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Unprecedented propane?SCR-NOx activity over template-free synthesized Al-rich Co-BEA* zeolite

Popis výsledku v původním jazyce

An Al-rich Co-BEA* zeolite (Si/Al 4.2, Co/Al 0.5) was prepared by organotemplate-free hydrothermal synthesis and [Co(II)(H2O)6]2+ ion exchange. The structure of the Co species and their activity in C3H8?SCR-NOx were compared to that of Si-rich Co-BEA* (Si/Al 11.3). The high population of AlSiAl sequences in Al-rich BEA* with AlO4 facing different channels, contrary to their absence in Si-rich BEA*, results in dehydrated Co-BEA* in easily reducible counter-ion [Co(III)O]+ species attached to one AlO4. The high concentration and density of these Co-oxo species in Al-rich Co-BEA* facilitates extra-ordinarily high SCR-NOx rate even under water vapor up to 10 vol.%, twelve-times outperforming Si-rich Co-BEA*. The five-to-six times increased TOF and easier reducibility suggest a synergetic redox effect of water-resistant Co-oxo species. The Al-rich Co-BEA* provides the highest reaction rate at conditions of wet NOx streams, exceeding that previously reported for metal ion/oxo zeolite catalys

Název v anglickém jazyce

Unprecedented propane?SCR-NOx activity over template-free synthesized Al-rich Co-BEA* zeolite

Popis výsledku anglicky

An Al-rich Co-BEA* zeolite (Si/Al 4.2, Co/Al 0.5) was prepared by organotemplate-free hydrothermal synthesis and [Co(II)(H2O)6]2+ ion exchange. The structure of the Co species and their activity in C3H8?SCR-NOx were compared to that of Si-rich Co-BEA* (Si/Al 11.3). The high population of AlSiAl sequences in Al-rich BEA* with AlO4 facing different channels, contrary to their absence in Si-rich BEA*, results in dehydrated Co-BEA* in easily reducible counter-ion [Co(III)O]+ species attached to one AlO4. The high concentration and density of these Co-oxo species in Al-rich Co-BEA* facilitates extra-ordinarily high SCR-NOx rate even under water vapor up to 10 vol.%, twelve-times outperforming Si-rich Co-BEA*. The five-to-six times increased TOF and easier reducibility suggest a synergetic redox effect of water-resistant Co-oxo species. The Al-rich Co-BEA* provides the highest reaction rate at conditions of wet NOx streams, exceeding that previously reported for metal ion/oxo zeolite catalys

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

—

Svazek periodika

332

Číslo periodika v rámci svazku

DEC 2015

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

201-211

Kód UT WoS článku

000366073500022

EID výsledku v databázi Scopus

2-s2.0-84946820322