CuZnAl hydrotalcites as suitable precursors for chromium-free ester hydrogenolysis catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F22%3A43924338" target="_blank" >RIV/60461373:22320/22:43924338 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22350/22:43924338

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0926860X22003349" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0926860X22003349</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2022.118811" target="_blank" >10.1016/j.apcata.2022.118811</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CuZnAl hydrotalcites as suitable precursors for chromium-free ester hydrogenolysis catalysts

Popis výsledku v původním jazyce

Ester hydrogenolysis is industrially performed over Adkins catalysts. Their use is being restricted as they contain environmentally unfriendly Cr2O3. As a potential replacement, five co-precipitated CuZnAl catalysts with various Cu/Zn and Al/(Cu+Zn) atomic ratios were studied. The structure transformation during the whole catalyst lifecycle was determined. The catalyst precursors consisted of CuZnAl-hydrotalcite (HTC). Although the Cu/Zn ratio did not affect the HTC structure, an increase in Al content resulted in smaller Cu nanoparticles with a larger surface area. In the reduced catalysts, both Cu+ and Cu0 species were identified using FTIR-CO. XPS revealed catalyst surface reconstruction after catalyst reduction and catalytic reaction. The evaluation of the catalysts in dimethyl adipate hydrogenolysis indicated that the catalyst having the lowest Cu loading possessed the highest activity, due to its high SCu and Cu/Zn = 1. Generally, higher activity was achieved by reducing the Cu/Zn and increasing the Al/(Cu+Zn) ratios. © 2022 Elsevier B.V.

Název v anglickém jazyce

CuZnAl hydrotalcites as suitable precursors for chromium-free ester hydrogenolysis catalysts

Popis výsledku anglicky

Ester hydrogenolysis is industrially performed over Adkins catalysts. Their use is being restricted as they contain environmentally unfriendly Cr2O3. As a potential replacement, five co-precipitated CuZnAl catalysts with various Cu/Zn and Al/(Cu+Zn) atomic ratios were studied. The structure transformation during the whole catalyst lifecycle was determined. The catalyst precursors consisted of CuZnAl-hydrotalcite (HTC). Although the Cu/Zn ratio did not affect the HTC structure, an increase in Al content resulted in smaller Cu nanoparticles with a larger surface area. In the reduced catalysts, both Cu+ and Cu0 species were identified using FTIR-CO. XPS revealed catalyst surface reconstruction after catalyst reduction and catalytic reaction. The evaluation of the catalysts in dimethyl adipate hydrogenolysis indicated that the catalyst having the lowest Cu loading possessed the highest activity, due to its high SCu and Cu/Zn = 1. Generally, higher activity was achieved by reducing the Cu/Zn and increasing the Al/(Cu+Zn) ratios. © 2022 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

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

Návaznosti

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

Rok uplatnění

2022

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

644

Číslo periodika v rámci svazku

25 August 2022

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000863090500009

EID výsledku v databázi Scopus

2-s2.0-85135882494