Informace o publikaci
Synthesis of High Surface Area Cu/SiO2 Nanofiber Catalysts for Non-Oxidative Ethanol Dehydrogenation
| Autoři | |
|---|---|
| Rok publikování | 2024 |
| Druh | Další prezentace na konferencích |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | 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 |
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