Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for
Non-Oxidative Ethanol Dehydrogenation

k 2024

Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation

KRÁL, Zdeněk; Tomáš POKORNÝ; Petr MACHÁČ; Zdeněk MORAVEC; Lucie ŠIMONÍKOVÁ et al.

Základní údaje

Originální název

Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation

Autoři

KRÁL, Zdeněk; Tomáš POKORNÝ; Petr MACHÁČ; Zdeněk MORAVEC; Lucie ŠIMONÍKOVÁ; Vojtěch KUNDRÁT; Aleš STÝSKALÍK a Jiří PINKAS

Vydání

NANOCON 2024, 2024

Další údaje

Jazyk

angličtina

Typ výsledku

Prezentace na konferencích

Obor

10400 1.4 Chemical sciences

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Organizační jednotka

Přírodovědecká fakulta

Změněno: 16. 9. 2025 20:28, RNDr. Zdeněk Král

Anotace

V originále

Amidst growing concerns over the environmental impact of petroleum-based industries and their contribution to global ecological challenges, there is a pressing need for sustainable alternatives in chemical synthesis. This study addresses this imperative by exploring an innovative catalytic approach for the eco-friendly production of acetaldehyde from ethanol, a crucial chemical feedstock. Catalysts utilized so far perform poorly due to their low stability. Supported copper nanoparticles at higher temperatures suffer from the rapid deactivation caused by nanoparticles sintering and reduction of active sites by coking. To address this issue, the advanced copper nanoparticle-decorated nanofibers (107 nm in diameter) with outstanding surfacer area (700 m2 g-1) were synthesized and tested, showing enhanced stability to benchmark (Aerosil 300 SiO2/Cu). Two approaches were compared for copper catalyst preparation, i.e., dry impregnation and one-pot synthesis. Remarkably, the dry-impregnated DI-9.4 sample at 325 °C after 100 h remained at over 66 % of ethanol conversion with 99 % selectivity to acetaldehyde (acetaldehyde productivity: 3.09 g g h-1) compared to benchmark catalyst dropped to 40 % of ethanol conversion. These findings highlight the potential of the superior morphological advantage of electrospun SiO2 nanofibers as efficient catalysts

Návaznosti

CZ.02.01.01/00/22_008/0004572, interní kód MU

Název: Kvantové materiály pro aplikace v udržitelných technologiích

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Kvantové materiály pro aplikace v udržitelných technologiích, Priorita 1 - Výzkum a vývoj

Citovat

KRÁL, Zdeněk; Tomáš POKORNÝ; Petr MACHÁČ; Zdeněk MORAVEC; Lucie ŠIMONÍKOVÁ; Vojtěch KUNDRÁT; Aleš STÝSKALÍK a Jiří PINKAS. Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation. In NANOCON 2024. 2024.

@proceedings{2519038,
   author = {Král, Zdeněk and Pokorný, Tomáš and Macháč, Petr and Moravec, Zdeněk and Šimoníková, Lucie and Kundrát, Vojtěch and Stýskalík, Aleš and Pinkas, Jiří},
   booktitle = {NANOCON 2024},
   language = {eng},
   title = {Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation},
   year = {2024}
}

TY  - CONF
ID  - 2519038
AU  - Král, Zdeněk - Pokorný, Tomáš - Macháč, Petr - Moravec, Zdeněk - Šimoníková, Lucie - Kundrát, Vojtěch - Stýskalík, Aleš - Pinkas, Jiří
PY  - 2024
TI  - Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation
N2  - Amidst growing concerns over the environmental impact of petroleum-based industries and their contribution to global ecological challenges, there is a pressing need for sustainable alternatives in chemical synthesis. This study addresses this imperative by exploring an innovative catalytic approach for the eco-friendly production of acetaldehyde from ethanol, a crucial chemical feedstock. Catalysts utilized so far perform poorly due to their low stability. Supported copper nanoparticles at higher temperatures suffer from the rapid deactivation caused by nanoparticles sintering and reduction of active sites by coking. To address this issue, the advanced copper nanoparticle-decorated nanofibers (107 nm in diameter) with outstanding surfacer area (700 m2 g-1) were synthesized and tested, showing enhanced stability to benchmark (Aerosil 300 SiO2/Cu). Two approaches were compared for copper catalyst preparation, i.e., dry impregnation and one-pot synthesis. Remarkably, the dry-impregnated DI-9.4 sample at 325 °C after 100 h remained at over 66 % of ethanol conversion with 99 % selectivity to acetaldehyde (acetaldehyde productivity: 3.09 g g h-1) compared to benchmark catalyst dropped to 40 % of ethanol conversion. These findings highlight the potential of the superior morphological advantage of electrospun SiO2 nanofibers as efficient catalysts
ER  -

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