Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F13%3A00421156" target="_blank" >RIV/61388955:_____/13:00421156 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/cctc.201200925" target="_blank" >http://dx.doi.org/10.1002/cctc.201200925</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cctc.201200925" target="_blank" >10.1002/cctc.201200925</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites

Popis výsledku v původním jazyce

The catalytic behavior of isomorphously substituted B-, Al-, Ga-, and Fe-containing extra-large-pore UTL zeolites was investigated in the acylation of p-xylene with benzoyl chloride and Beckmann rearrangement of 1-indanone oxime. The clear synergism between the BrOnsted acidity (i.e., the concentration and the strength of protonic acid sites) of UTL catalysts and their activity in benzoylation was established. (Ga)UTL zeolite containing the BrOnsted acid sites of medium strength is characterized by theoptimum activity and selectivity in the benzoylation of p-xylene. Because of a higher accessibility of active centers, (Al)UTL zeolite appears to be a more active and selective catalyst than (Al)BEA in the benzoylation of p-xylene. In contrast to (B), (Ga), and (Al)UTL, the leaching of active sites occurs in the benzoylation over (Fe)UTL. All UTL zeolites showed 100% selectivity in the Beckmann rearrangement of 1-indanone oxime, which provides the target 3,4-dihydroquinolin-2(1H)-one. (B

Název v anglickém jazyce

Extra-Large-Pore Zeolites with UTL Topology: Control of the Catalytic Activity by Variation in the Nature of the Active Sites

Popis výsledku anglicky

The catalytic behavior of isomorphously substituted B-, Al-, Ga-, and Fe-containing extra-large-pore UTL zeolites was investigated in the acylation of p-xylene with benzoyl chloride and Beckmann rearrangement of 1-indanone oxime. The clear synergism between the BrOnsted acidity (i.e., the concentration and the strength of protonic acid sites) of UTL catalysts and their activity in benzoylation was established. (Ga)UTL zeolite containing the BrOnsted acid sites of medium strength is characterized by theoptimum activity and selectivity in the benzoylation of p-xylene. Because of a higher accessibility of active centers, (Al)UTL zeolite appears to be a more active and selective catalyst than (Al)BEA in the benzoylation of p-xylene. In contrast to (B), (Ga), and (Al)UTL, the leaching of active sites occurs in the benzoylation over (Fe)UTL. All UTL zeolites showed 100% selectivity in the Beckmann rearrangement of 1-indanone oxime, which provides the target 3,4-dihydroquinolin-2(1H)-one. (B

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GBP106%2F12%2FG015" target="_blank" >GBP106/12/G015: Vývoj nových nanoporézních adsorbentů a katalyzátorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

ChemCatChem

ISSN

1867-3880

e-ISSN

—

Svazek periodika

5

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

1891-1898

Kód UT WoS článku

000320929200038

EID výsledku v databázi Scopus

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