In situ synchrotron X-ray diffraction reveals the disassembly-organisation mechanism of germanosilicate zeolites in HCl vapour
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10453425" target="_blank" >RIV/00216208:11310/22:10453425 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yHc1kLMTrm" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yHc1kLMTrm</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2qi00211f" target="_blank" >10.1039/d2qi00211f</a>
Alternative languages
Result language
angličtina
Original language name
In situ synchrotron X-ray diffraction reveals the disassembly-organisation mechanism of germanosilicate zeolites in HCl vapour
Original language description
The assembly-disassembly-organisation-reassembly (ADOR) approach extends the synthesis of new zeolites. Understanding the disassembly and organisation mechanism is important to optimise the post-treatment process on germanosilicate zeolites. In situ synchrotron X-ray diffraction technique was applied to study the mechanism of these two steps in HCl vapour, which it is often unfeasible to capture using conventional ex situ characterisation. Three germanosilicate zeolites with different pore systems, i.e.UTL, UOV and IWR, were selected as models to compare the reaction behaviours. Three key steps, including fast hydrolysis of d4r units (ca. 1 min), further disassembly (ca. 3-5 min), and self-organisation after disassembly (ca. 2-3 min), were observed in the HCl acid vapour. An unusual lattice expansion of the intralayer was observed at the very beginning of the hydrolysis process in IWR, while the UTL and UOV showed continuous shrinkage. Owing to the diffusion differences related to the structural features, extra-large-pore UTL zeolite showed faster kinetics than the other two large-pore zeolites, although UTL zeolite has much larger crystals. These findings potentially guide further modification of the treatment parameters in the ADOR process to prepare new zeolites.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA20-12099S" target="_blank" >GA20-12099S: Advanced characterization of active sites in novel zeolite-based catalysts</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Inorganic Chemistry Frontiers [online]
ISSN
2052-1553
e-ISSN
2052-1553
Volume of the periodical
9
Issue of the periodical within the volume
14
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
3453-3460
UT code for WoS article
000804228900001
EID of the result in the Scopus database
2-s2.0-85131763346