Post-Synthesis Stabilization of Germanosilicate Zeolites ITH, IWW, and UTL by Substitution of Ge for Al
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00467334" target="_blank" >RIV/61388955:_____/16:00467334 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/chem.201603434" target="_blank" >http://dx.doi.org/10.1002/chem.201603434</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/chem.201603434" target="_blank" >10.1002/chem.201603434</a>
Alternative languages
Result language
angličtina
Original language name
Post-Synthesis Stabilization of Germanosilicate Zeolites ITH, IWW, and UTL by Substitution of Ge for Al
Original language description
Germanosilicate zeolites often suffer from low hydrothermal stability due to the high content of Ge. Herein, we investigated the post-synthesis introduction of Al accompanied by stabilization of selected germanosilicates by degermanation/alumination treatments. The influence of chemical composition and topology of parent germanosilicate zeolites (ITH, IWW, and UTL) on the post-synthesis incorporation of Al was studied. Alumination of ITH (Si/Ge=2-13) and IWW (Si/Ge=3-7) zeolites resulted in the partial substitution of Ge for Al (up to 80%), which was enhanced with a decrease of Ge content in the parent zeolite. In contrast, in extra-large pore zeolite UTL (Si/Ge=4-6) the hydrolysis of the interlayer Ge-O bonds dominated over substitution. The stabilization of zeolite UTL was achieved using a novel two-step degermanation/alumination procedure by the partial post-synthesis substitution of Ge for Si followed by alumination. This new method of stabilization and incorporation of strong acid sites may extend the utilization of germanosilicate zeolites, which has been until now been limited.
Czech name
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Czech description
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Classification
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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Result continuities
Project
<a href="/en/project/GP14-30898P" target="_blank" >GP14-30898P: Understanding of catalytic activity of novel isomorphously substituted microporous germanosilicates</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemistry A European Journal
ISSN
1521-3765
e-ISSN
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Volume of the periodical
22
Issue of the periodical within the volume
48
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
17377-17386
UT code for WoS article
000387854800036
EID of the result in the Scopus database
2-s2.0-84991648617