Do metal-oxide promoters of Cu hydrogenolysis catalysts affect the Cu intrinsic activity?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F20%3A43920340" target="_blank" >RIV/60461373:22320/20:43920340 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22350/20:43920340 RIV/00216275:25310/20:39916659 RIV/61989100:27710/20:10245596

Výsledek na webu

<a href="https://doi.org/10.1016/j.apcata.2020.117889" target="_blank" >https://doi.org/10.1016/j.apcata.2020.117889</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2020.117889" target="_blank" >10.1016/j.apcata.2020.117889</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Do metal-oxide promoters of Cu hydrogenolysis catalysts affect the Cu intrinsic activity?

Popis výsledku v původním jazyce

The well-established ester hydrogenolysis process has to be further improved to reduce its high energy demand and to replace used Adkins CuCr catalysts by chromium-free alternatives. In this study, the copper-based catalyst was modified by ZnO, ZnO with Al2O3 or MgO to elucidate the metal-oxide influence on catalyst structure, activity, performance and stability in ester hydrogenolysis. The catalysts composition, structure and physicochemical properties were examined by AAS, XRD, TPR, BET, N2O-RFC, TGA-MS, NH3-TPD and CO2-TPD. It was confirmed that copper itself possesses high intrinsic activity for ester hydrogenolysis but the unpromoted copper species were very unstable. All used metal oxides were proven to be structural promoters stabilizing copper species and increasing the number of active sites. Consequently, they enhanced remarkably catalyst performance in dimethyl adipate conversion despite the decreased intrinsic activity of Cu active sites. All prepared catalysts outperformed a commercial CuCr catalyst in dimethyl adipate hydrogenolysis. © 2020 Elsevier B.V.

Název v anglickém jazyce

Do metal-oxide promoters of Cu hydrogenolysis catalysts affect the Cu intrinsic activity?

Popis výsledku anglicky

The well-established ester hydrogenolysis process has to be further improved to reduce its high energy demand and to replace used Adkins CuCr catalysts by chromium-free alternatives. In this study, the copper-based catalyst was modified by ZnO, ZnO with Al2O3 or MgO to elucidate the metal-oxide influence on catalyst structure, activity, performance and stability in ester hydrogenolysis. The catalysts composition, structure and physicochemical properties were examined by AAS, XRD, TPR, BET, N2O-RFC, TGA-MS, NH3-TPD and CO2-TPD. It was confirmed that copper itself possesses high intrinsic activity for ester hydrogenolysis but the unpromoted copper species were very unstable. All used metal oxides were proven to be structural promoters stabilizing copper species and increasing the number of active sites. Consequently, they enhanced remarkably catalyst performance in dimethyl adipate conversion despite the decreased intrinsic activity of Cu active sites. All prepared catalysts outperformed a commercial CuCr catalyst in dimethyl adipate hydrogenolysis. © 2020 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA17-05704S" target="_blank" >GA17-05704S: Studium a optimalizace promotovaných CuZnAl hydrogenačních katalyzátorů</a><br>

Návaznosti

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

Rok uplatnění

2020

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

—

Svazek periodika

608

Číslo periodika v rámci svazku

25.11.2020

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000592362100004

EID výsledku v databázi Scopus

2-s2.0-85094583485