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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Unprecedented propane?SCR-NOx activity over template-free synthesized Al-rich Co-BEA* zeolite
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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