Aldol condensation of furfural with acetone over ion-exchanged and impregnated potassium BEA zeolites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22350%2F16%3A43901751" target="_blank" >RIV/60461373:22350/16:43901751 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/16:00472522 RIV/62243136:_____/16:N0000005 RIV/00216275:25310/16:39902167

Výsledek na webu

<a href="http://www.sciencedirect.com.ezproxy.vscht.cz/science/article/pii/S1381116916303867" target="_blank" >http://www.sciencedirect.com.ezproxy.vscht.cz/science/article/pii/S1381116916303867</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.molcata.2016.09.014" target="_blank" >10.1016/j.molcata.2016.09.014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Aldol condensation of furfural with acetone over ion-exchanged and impregnated potassium BEA zeolites

Popis výsledku v původním jazyce

Potassium-containing BEA zeolites were prepared by ion-exchange from NH4-BEA with potassium nitrateaqueous solution or ion-exchange combined with impregnation. The samples were used as basic catalystsfor aldol condensation of furfural and acetone studied in a batch reactor at 100°C, autogenous pressureand a reaction time of 2 h. To establish a relationship between physico-chemical properties and catalyticbehavior of BEA zeolites, the samples were characterized by XRD, N2adsorption, FTIR, calorimetry, andTGA. The ion-exchanged K-BEA catalysts exhibited low activity in the aldol condensation because of aweak strength of intrinsic basic sites. In contrast, the samples prepared by ion exchange combined withimpregnation possessed strong basic sites, plausibly K2O clusters, and demonstrated appreciable activityin the aldol condensation. TGA results proved that, in contrast to acidic zeolites, basic sites of impregnatedBEA samples hardly contribute to the formation of heavy carbonaceous deposits during the reaction whatcould be advantageous for the stable behavior of catalysts.

Název v anglickém jazyce

Aldol condensation of furfural with acetone over ion-exchanged and impregnated potassium BEA zeolites

Popis výsledku anglicky

Potassium-containing BEA zeolites were prepared by ion-exchange from NH4-BEA with potassium nitrateaqueous solution or ion-exchange combined with impregnation. The samples were used as basic catalystsfor aldol condensation of furfural and acetone studied in a batch reactor at 100°C, autogenous pressureand a reaction time of 2 h. To establish a relationship between physico-chemical properties and catalyticbehavior of BEA zeolites, the samples were characterized by XRD, N2adsorption, FTIR, calorimetry, andTGA. The ion-exchanged K-BEA catalysts exhibited low activity in the aldol condensation because of aweak strength of intrinsic basic sites. In contrast, the samples prepared by ion exchange combined withimpregnation possessed strong basic sites, plausibly K2O clusters, and demonstrated appreciable activityin the aldol condensation. TGA results proved that, in contrast to acidic zeolites, basic sites of impregnatedBEA samples hardly contribute to the formation of heavy carbonaceous deposits during the reaction whatcould be advantageous for the stable behavior of catalysts.

Druh

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

CEP obor

CA - Anorganická 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

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal Of Molecular Catalysis A-Chemical

ISSN

1381-1169

e-ISSN

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Svazek periodika

424

Číslo periodika v rámci svazku

1 December 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

358-368

Kód UT WoS článku

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EID výsledku v databázi Scopus

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