Environmentally benign synthesis of hydrotalcite-like materials for enhanced efficiency of aldol condensation reactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43928271" target="_blank" >RIV/60461373:22310/24:43928271 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22320/24:43928271 RIV/60461373:22350/24:43928271

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0926860X23004866?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0926860X23004866?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2023.119506" target="_blank" >10.1016/j.apcata.2023.119506</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Environmentally benign synthesis of hydrotalcite-like materials for enhanced efficiency of aldol condensation reactions

Popis výsledku v původním jazyce

MgAl hydrotalcites (HTCs) are promising catalysts for biomass valorization applications. However, their production suffers from excessive wastewater generation while their application is limited by insufficient accessibility of active sites. Here, we change the paradigm of hydrotalcite synthesis by replacing the traditional co-precipitation by MgO impregnation with aluminum isopropoxide followed by calcination and (re)hydration. This synthesis affords surface HTC phase ensuring excellent accessibility to Brønsted basic sites. HTC supported on MgO surface (bulk Mg/Al = 20) exhibited same conversion and selectivity in aldol condensation of furfural with acetone as conventional HTC (Mg/Al = 3). Besides maximized efficiency of aluminum use to generate accessible Brønsted basic sites, the catalyst was stable in several consecutive catalytic experiments, if optimal rehydration conditions were applied. Moreover, the use of large quantities of water required for the co-precipitation-based method was avoided. This makes the new method superior also from green synthesis and sustainability point of view. © 2023 Elsevier B.V.

Název v anglickém jazyce

Environmentally benign synthesis of hydrotalcite-like materials for enhanced efficiency of aldol condensation reactions

Popis výsledku anglicky

MgAl hydrotalcites (HTCs) are promising catalysts for biomass valorization applications. However, their production suffers from excessive wastewater generation while their application is limited by insufficient accessibility of active sites. Here, we change the paradigm of hydrotalcite synthesis by replacing the traditional co-precipitation by MgO impregnation with aluminum isopropoxide followed by calcination and (re)hydration. This synthesis affords surface HTC phase ensuring excellent accessibility to Brønsted basic sites. HTC supported on MgO surface (bulk Mg/Al = 20) exhibited same conversion and selectivity in aldol condensation of furfural with acetone as conventional HTC (Mg/Al = 3). Besides maximized efficiency of aluminum use to generate accessible Brønsted basic sites, the catalyst was stable in several consecutive catalytic experiments, if optimal rehydration conditions were applied. Moreover, the use of large quantities of water required for the co-precipitation-based method was avoided. This makes the new method superior also from green synthesis and sustainability point of view. © 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/GA19-22978S" target="_blank" >GA19-22978S: Kvantifikace basicity rekonstruovaných podvojných vrstevnatých hydroxidů a její vztah s katalytickým chováním v bazicky katalyzovaných reakcích</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

APPLIED CATALYSIS A-GENERAL

ISSN

0926-860X

e-ISSN

1873-3875

Svazek periodika

669

Číslo periodika v rámci svazku

669

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

119506

Kód UT WoS článku

001124114000001

EID výsledku v databázi Scopus

2-s2.0-85178287846