Comparison of the properties and catalytic activity of commercially and laboratory prepared Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F19%3AN0000013" target="_blank" >RIV/62243136:_____/19:N0000013 - isvavai.cz</a>

Výsledek na webu

<a href="https://link-springer-com.ezproxy.techlib.cz/content/pdf/10.1007%2Fs11144-018-1497-7.pdf" target="_blank" >https://link-springer-com.ezproxy.techlib.cz/content/pdf/10.1007%2Fs11144-018-1497-7.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-018-1497-7" target="_blank" >10.1007/s11144-018-1497-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of the properties and catalytic activity of commercially and laboratory prepared Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural

Popis výsledku v původním jazyce

In recent years, for deeper understanding of the behavior of various heterogeneous catalysts, aldol condensation of acetone and furfural has been researched in detail. In this article, the carbonyl reactants are represented by cyclohexanone and furfural as the platform chemicals for synthesis the fundamental building blocks for future biorefineries. Our main goal was to explore the structural and acid–base properties and to compare them with catalytic characteristics of Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural. The aforesaid basic heterogeneous catalysts were obtained by the calcination of commercially and laboratory prepared hydrotalcites with different molar ratios (1:1–5:1). Their physicochemical properties were determined based on several analytical methods: XRD, ICP-OES, SEM, N2 physisorption, TGA, TGA-MS, DRIFT, TPD-CO2 and TPD-NH3. Through XRD, it was found that as-synthesized laboratory hydrotalcites had the pure crystalline hydrotalcite structure while commercial ones contained also the brucite and MgO phases. By using TPD-CO2 and TPD-NH3, the measured values, especially the total amount of basic sites, provided the best correlation with the catalytic activity of investigated catalysts. Comparable conversions of furfural (ca. 87%) were achieved on laboratory and commercial mixed oxides with the Mg/Al molar ratio 1:1 and 3:1, respectively. They had no obvious difference in selectivity to FCH (about 20%) whereas the commercial samples showed higher selectivity to F2CH (26% at max conversion) than the laboratory ones (17%).

Název v anglickém jazyce

Comparison of the properties and catalytic activity of commercially and laboratory prepared Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural

Popis výsledku anglicky

In recent years, for deeper understanding of the behavior of various heterogeneous catalysts, aldol condensation of acetone and furfural has been researched in detail. In this article, the carbonyl reactants are represented by cyclohexanone and furfural as the platform chemicals for synthesis the fundamental building blocks for future biorefineries. Our main goal was to explore the structural and acid–base properties and to compare them with catalytic characteristics of Mg/Al mixed oxides in aldol condensation of cyclohexanone with furfural. The aforesaid basic heterogeneous catalysts were obtained by the calcination of commercially and laboratory prepared hydrotalcites with different molar ratios (1:1–5:1). Their physicochemical properties were determined based on several analytical methods: XRD, ICP-OES, SEM, N2 physisorption, TGA, TGA-MS, DRIFT, TPD-CO2 and TPD-NH3. Through XRD, it was found that as-synthesized laboratory hydrotalcites had the pure crystalline hydrotalcite structure while commercial ones contained also the brucite and MgO phases. By using TPD-CO2 and TPD-NH3, the measured values, especially the total amount of basic sites, provided the best correlation with the catalytic activity of investigated catalysts. Comparable conversions of furfural (ca. 87%) were achieved on laboratory and commercial mixed oxides with the Mg/Al molar ratio 1:1 and 3:1, respectively. They had no obvious difference in selectivity to FCH (about 20%) whereas the commercial samples showed higher selectivity to F2CH (26% at max conversion) than the laboratory ones (17%).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/TH01011223" target="_blank" >TH01011223: Modifikované hydrotalcity pro heterogenní katalýzu bazických kondenzačních reakcí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Reaction Kinetics, Mechanisms and Catalysis

ISSN

1878-5204

e-ISSN

—

Svazek periodika

1

Číslo periodika v rámci svazku

126

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

17

Strana od-do

219-235

Kód UT WoS článku

000458562400014

EID výsledku v databázi Scopus

2-s2.0-85056872076