Ethanol Dehydrogenation over Copper-Silica Catalysts: From Sub-Nanometer Clusters to 15 nm Large Particles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F23%3A00574069" target="_blank" >RIV/68081723:_____/23:00574069 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/23:00132141 RIV/61989100:27710/23:10253375 RIV/00216305:26620/23:PU150328

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acssuschemeng.2c06777" target="_blank" >https://pubs.acs.org/doi/10.1021/acssuschemeng.2c06777</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.2c06777" target="_blank" >10.1021/acssuschemeng.2c06777</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ethanol Dehydrogenation over Copper-Silica Catalysts: From Sub-Nanometer Clusters to 15 nm Large Particles

Popis výsledku v původním jazyce

Comparison of four preparation methodsshowed that the simpleand cost-effective dry impregnation provides Cu/SiO2 materialshowing the most stable catalytic behavior in potential renewableacetaldehyde production despite having a broad particle size distribution.nnNon-oxidative ethanoldehydrogenation is a renewable source ofacetaldehyde and hydrogen. The reaction is often catalyzed by supportedcopper catalysts with high selectivity. The activity and long-termstability depend on many factors, including particle size, choiceof support, doping, etc. Herein, we present four different syntheticpathways to prepare Cu/SiO2 catalysts (& SIM,2.5 wt %Cu) with varying copper distribution: hydrolytic sol-gel (sub-nanometerclusters), dry impregnation (A ̅ = 3.4 nm, & sigma,= 0.9 nm and particles up to 32 nm), strong electrostatic adsorption(A ̅ = 3.1 nm, & sigma, = 0.6 nm), and solvothermalhot injection followed by Cu particle deposition (A ̅ = 4.0 nm, & sigma, = 0.8 nm). All materials were characterized byICP-OES, XPS, N-2 physisorption, STEM-EDS, XRD, RFC N2O, and H-2-TPR and tested in ethanol dehydrogenationfrom 185 to 325 & DEG,C. The sample prepared by hydrolytic sol-gelexhibited high Cu dispersion and, accordingly, the highest catalyticactivity. Its acetaldehyde productivity (2.79 g g(-1) h(-1) at 255 & DEG,C) outperforms most of the Cu-basedcatalysts reported in the literature, but it lacks stability and tendsto deactivate over time. On the other hand, the sample prepared bysimple and cost-effective dry impregnation, despite having Cu particlesof various sizes, was still highly active (2.42 g g(-1) h(-1) acetaldehyde at 255 & DEG,C). Importantly,it was the most stable sample out of the studied materials. The characterizationof the spent catalyst confirmed its exceptional properties: it showedthe lowest extent of both coking and particle sintering.

Název v anglickém jazyce

Ethanol Dehydrogenation over Copper-Silica Catalysts: From Sub-Nanometer Clusters to 15 nm Large Particles

Popis výsledku anglicky

Comparison of four preparation methodsshowed that the simpleand cost-effective dry impregnation provides Cu/SiO2 materialshowing the most stable catalytic behavior in potential renewableacetaldehyde production despite having a broad particle size distribution.nnNon-oxidative ethanoldehydrogenation is a renewable source ofacetaldehyde and hydrogen. The reaction is often catalyzed by supportedcopper catalysts with high selectivity. The activity and long-termstability depend on many factors, including particle size, choiceof support, doping, etc. Herein, we present four different syntheticpathways to prepare Cu/SiO2 catalysts (& SIM,2.5 wt %Cu) with varying copper distribution: hydrolytic sol-gel (sub-nanometerclusters), dry impregnation (A ̅ = 3.4 nm, & sigma,= 0.9 nm and particles up to 32 nm), strong electrostatic adsorption(A ̅ = 3.1 nm, & sigma, = 0.6 nm), and solvothermalhot injection followed by Cu particle deposition (A ̅ = 4.0 nm, & sigma, = 0.8 nm). All materials were characterized byICP-OES, XPS, N-2 physisorption, STEM-EDS, XRD, RFC N2O, and H-2-TPR and tested in ethanol dehydrogenationfrom 185 to 325 & DEG,C. The sample prepared by hydrolytic sol-gelexhibited high Cu dispersion and, accordingly, the highest catalyticactivity. Its acetaldehyde productivity (2.79 g g(-1) h(-1) at 255 & DEG,C) outperforms most of the Cu-basedcatalysts reported in the literature, but it lacks stability and tendsto deactivate over time. On the other hand, the sample prepared bysimple and cost-effective dry impregnation, despite having Cu particlesof various sizes, was still highly active (2.42 g g(-1) h(-1) acetaldehyde at 255 & DEG,C). Importantly,it was the most stable sample out of the studied materials. The characterizationof the spent catalyst confirmed its exceptional properties: it showedthe lowest extent of both coking and particle sintering.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

ACS Sustainable Chemistry & Engineering

ISSN

2168-0485

e-ISSN

2168-0485

Svazek periodika

11

Číslo periodika v rámci svazku

30

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

10980-10992

Kód UT WoS článku

001033052800001

EID výsledku v databázi Scopus

2-s2.0-85166773876