Acidity and porosity properties of zeolites affect their catalytic performance in thymol synthesis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10481690" target="_blank" >RIV/00216208:11310/24:10481690 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WpdxkqgPIn" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WpdxkqgPIn</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.micromeso.2024.113198" target="_blank" >10.1016/j.micromeso.2024.113198</a>
Alternative languages
Result language
angličtina
Original language name
Acidity and porosity properties of zeolites affect their catalytic performance in thymol synthesis
Original language description
Thymol is synthesized from m-cresol alkylation reaction with 2-propanol. A few commercial zeolites have been tested in this reaction, but the influence of acidity and porosity of a zeolite on the m-cresol conversion and thymol yield is scarcely studied. Isomorphously-substituted Al-, Ga-, Fe-, B-, and In-UTL with different heteroelements and thus different ratio between strong and weak sites give insight into the effect of acidity. Isoreticular zeolites Al-UTL, Al-IPC-7, and Al-IPC-2 with different pore sizes reveal the effect of porosity. In this study, mcresol conversion was far from comparable over Al-UTL or Ga-UTL (X = 18-19 %) and Fe-UTL, B-UTL, or In-UTL (X = 2-3 %) having different concentration of strong Br phi nsted acid sites. Thymol yield was also higher over Aland Ga-UTL (Y = 11-13 %) than over Fe-, B-, and In-UTL (Y = 1-2 %). The easier accessibility to the strong Br phi nsted acid sites in Al-UTL, provided by bigger pore sizes, resulted in higher m-cresol conversion and thymol yield compared to Al-IPC-7 (X = 15 % and Y = 8 %) and Al-IPC-2 (X = 6 % and Y = 2 %). In addition, the stronger Br phi nsted acidity and large and extra-large porosity in Al-UTL and Ga-UTL facilitated the rearrangement of isopropyl-3-methylphenyl ether - the product of the O-alkylation pathway - to thymol. Thus, Al-UTL and GaUTL (along with Al-FAU reference material) confirmed the optimum structural properties for a high selectivity to thymol.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Microporous and Mesoporous Materials
ISSN
1387-1811
e-ISSN
1873-3093
Volume of the periodical
376
Issue of the periodical within the volume
August
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
113198
UT code for WoS article
001248110700001
EID of the result in the Scopus database
2-s2.0-85194494280