Synthesis of ZSM-5 Zeolites with Defined Distribution of Al Atoms in the Framework and Multinuclear MAS NMR Analysis of the Control of Al Distribution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F12%3A00384499" target="_blank" >RIV/61388955:_____/12:00384499 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/cm301629a" target="_blank" >http://dx.doi.org/10.1021/cm301629a</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/cm301629a" target="_blank" >10.1021/cm301629a</a>

Result language
angličtina
Original language name
Synthesis of ZSM-5 Zeolites with Defined Distribution of Al Atoms in the Framework and Multinuclear MAS NMR Analysis of the Control of Al Distribution
Original language description
Sets of ZSM-5 zeolites with different distributions of Al atoms in the framework were synthesized from the mixtures of Si/Al-gel 25-90, varying in the sequence of mixing and using Na-silicate or tetraethoxy orthosilicate as the Si source, AlCl3 or Al(NO3)(3) as the Al source, NaCl or Na-silicate as the Na source, and tetrapropylammonium hydroxide as the structure directing agent. The distribution of Al atoms in the ZSM-5 framework between single Al atoms and Al pairs of Al-O-(Si-O)(2)-Al sequences was monitored by the Si-29 MAS NMR, Co(II) ion exchange capacity and UV-vis spectroscopy of bare Co(II) ions in the dehydrated zeolites. The results showed that the distribution of Al atoms in the ZSM-5 framework can be controlled in a wide range of concentrations (6-66% of Al atoms in Al pairs for the given Si/Al) and Si/Al-prod 15-37. From the analysis of both the initial gels and crystalline products by the C-13, Al-27, and Si-29 (SP and CP) MAS NMR and FTIR, it was concluded that the elec
Czech name
—
Czech description
—

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
—

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
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)