Critical evaluation of the role of the distribution of Al atoms in the framework for the activity of metallo-zeolites in redox N2O/NOx reactions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F14%3A00427597" target="_blank" >RIV/61388955:_____/14:00427597 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.apcata.2013.07.033" target="_blank" >http://dx.doi.org/10.1016/j.apcata.2013.07.033</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apcata.2013.07.033" target="_blank" >10.1016/j.apcata.2013.07.033</a>

Result language
angličtina
Original language name
Critical evaluation of the role of the distribution of Al atoms in the framework for the activity of metallo-zeolites in redox N2O/NOx reactions
Original language description
Both the laboratory synthesized zeolites with tailored distribution of framework Al atoms and commercial ZSM-5 zeolites of various proveniences were investigated in a broad region of Si/Al ratio with respect to the distribution of Al atoms in the framework. The analysis of the distribution of framework Al atoms was done by using strictly defined conditions of Co(II) ion exchange and UV-Vis, 27Al and 29Si (CP) MAS NMR experiments. Evidence has been found that the distribution of framework Al atoms in ZSM-5, and in Si-rich zeolites in general, is not random and is not controlled by statistics, but occurs between the most populated Al pairs (Al-Si-Si-Al sequences in 6MRs) and single far distant Al atoms (Al-Sin>2-Al sequences) located in different rings.Depending on the type of Si- and Al-reactants and presence of TPA+/Na+ in gels, a broad distribution of Al atoms (from 5 to 85% of Al atoms in Al pairs) for Si/Al 12-20 can be achieved. At Si/Al > 20, the population of Al pairs decreases,
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
<a href="/en/project/GAP106%2F11%2F0624" target="_blank" >GAP106/11/0624: New category of zeolites with pentasil ring structure: Catalytic processes on zeolites with controlled distribution of aluminum atoms in the framework</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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