Zavedení cínu do mezoporézních molekulových sít pro oxidaci adamantanonu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F05%3A00026062" target="_blank" >RIV/61388955:_____/05:00026062 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Introduction of tin into mesoporous molecular sieves for oxidation of adamantanone

Popis výsledku v původním jazyce

Oxidation of adamantanone with hydrogen peroxide to the corresponding lactone was investigated in a liquid phase using mesoporous molecular sieve MCM-41 modified with tin as a catalyst. Two different direct and one post-synthesis procedures were used toprepare well-developed mesoporous molecular sieve (Sn)MCM-41 with concentration of tin in the range from 0.2 to 1.0 wt. %. It was shown that all three types of catalysts exhibited conversions of adamantanone between 50-65 % with the selectivity to the lactone close to 100 %. The adamantanone conversion does not correlate with the overall concentration of tin in MCM-41 or with the concentration of accessible Lewis acid sites associated with tin. This indicates that some amount of tin is hidden in the pore walls of MCM-41 and, therefore, is not accessible. In addition to that, all accessible Lewis sites do not contribute in the same way to the catalytic activity of (Sn)MCM-41. High efficiency of utilization of hydrogen peroxide was found.

Název v anglickém jazyce

Introduction of tin into mesoporous molecular sieves for oxidation of adamantanone

Popis výsledku anglicky

Oxidation of adamantanone with hydrogen peroxide to the corresponding lactone was investigated in a liquid phase using mesoporous molecular sieve MCM-41 modified with tin as a catalyst. Two different direct and one post-synthesis procedures were used toprepare well-developed mesoporous molecular sieve (Sn)MCM-41 with concentration of tin in the range from 0.2 to 1.0 wt. %. It was shown that all three types of catalysts exhibited conversions of adamantanone between 50-65 % with the selectivity to the lactone close to 100 %. The adamantanone conversion does not correlate with the overall concentration of tin in MCM-41 or with the concentration of accessible Lewis acid sites associated with tin. This indicates that some amount of tin is hidden in the pore walls of MCM-41 and, therefore, is not accessible. In addition to that, all accessible Lewis sites do not contribute in the same way to the catalytic activity of (Sn)MCM-41. High efficiency of utilization of hydrogen peroxide was found.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2005

Kód důvěrnosti údajů

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

Název periodika

Studies in Surface Science and Catalysis

ISSN

0167-2991

e-ISSN

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Svazek periodika

156

Číslo periodika v rámci svazku

-

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

779-786

Kód UT WoS článku

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EID výsledku v databázi Scopus

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