The use of highly polar additives to reduce the degradation of Cu/ZnO/ Al2O3 catalysts during the gas phase hydrogenation of CO2 to methanol and CO

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00638894" target="_blank" >RIV/61388955:_____/25:00638894 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/25:39923215

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0021951725004506?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0021951725004506?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcat.2025.116384" target="_blank" >10.1016/j.jcat.2025.116384</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The use of highly polar additives to reduce the degradation of Cu/ZnO/ Al2O3 catalysts during the gas phase hydrogenation of CO2 to methanol and CO

Popis výsledku v původním jazyce

The impact of catalyst deactivation due to sintering on the activity and properties of the Cu/ZnO/Al2O3 system in CO2 hydrogenation to methanol was systematically investigated. Additionally, the effects of various additives on methanol yield and catalyst stability during CO2/H2 hydrogenation were evaluated. Additives such as methanol were confirmed to enhance catalytic activity, while components with high dipole moments exhibited a poisoning effect. Interestingly, despite their deactivating influence on activity, these polar additives significantly improved catalyst stability. It is presumed that highly polar species adsorb onto the catalyst surface, displacing water that would otherwise promote crystal growth of copper and zinc oxides, leading to deactivation. A combined additive strategy using methanol (to boost activity) and propylene carbonate (to enhance stability) offers a novel approach to significantly slow down Cu/ZnO/Al2O3 catalyst deactivation during gas-phase CO2 hydrogenation, without compromising initial activity compared to conventional additive-free systems. Thus, catalyst stability can be effectively improved through the addition of appropriate components to the feed, without sacrificing reaction rate.

Název v anglickém jazyce

The use of highly polar additives to reduce the degradation of Cu/ZnO/ Al2O3 catalysts during the gas phase hydrogenation of CO2 to methanol and CO

Popis výsledku anglicky

The impact of catalyst deactivation due to sintering on the activity and properties of the Cu/ZnO/Al2O3 system in CO2 hydrogenation to methanol was systematically investigated. Additionally, the effects of various additives on methanol yield and catalyst stability during CO2/H2 hydrogenation were evaluated. Additives such as methanol were confirmed to enhance catalytic activity, while components with high dipole moments exhibited a poisoning effect. Interestingly, despite their deactivating influence on activity, these polar additives significantly improved catalyst stability. It is presumed that highly polar species adsorb onto the catalyst surface, displacing water that would otherwise promote crystal growth of copper and zinc oxides, leading to deactivation. A combined additive strategy using methanol (to boost activity) and propylene carbonate (to enhance stability) offers a novel approach to significantly slow down Cu/ZnO/Al2O3 catalyst deactivation during gas-phase CO2 hydrogenation, without compromising initial activity compared to conventional additive-free systems. Thus, catalyst stability can be effectively improved through the addition of appropriate components to the feed, without sacrificing reaction rate.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

1090-2694

Svazek periodika

451

Číslo periodika v rámci svazku

NOV 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

116384

Kód UT WoS článku

001561755400001

EID výsledku v databázi Scopus

2-s2.0-105014106437