Investigations into the conversion of ethanol to butadiene-1,3 using CuO/$\protect \text{La}_2\protect \text{O}_3$/$\protect \text{ZrO}_2$/$\protect \text{SiO}_2$ catalyst systems
Catalyst systems of the Lebedev reaction from oxides of Zn, Zr, La, Cu and silica gel were investigated. The catalysts were characterized by BET, XRF, XRD, TPD-$\text{NH}_3$ and TPR. The parameters of ethanol to butadiene-1,3 process were determined using ethanol, acetaldehyde and water as raw mater...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Académie des sciences
2023-03-01
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| Series: | Comptes Rendus. Chimie |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.221/ |
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| Summary: | Catalyst systems of the Lebedev reaction from oxides of Zn, Zr, La, Cu and silica gel were investigated. The catalysts were characterized by BET, XRF, XRD, TPD-$\text{NH}_3$ and TPR. The parameters of ethanol to butadiene-1,3 process were determined using ethanol, acetaldehyde and water as raw materials without inert diluents. When using a mixture of ethanol and acetaldehyde as a feedstock, the selectivity of the butadiene-1,3 formation exceeds 60% and its productivity is at least $0.32~\text{g}_{\mathrm{BD}}{\cdot } \text{g}_{\mathrm{cat}}^{-1}{\cdot }\text{h}^{-1}$. The average butadiene-1,3 yield was over 34% in 8 h. The stability of the CuO/$\text{La}_2\text{O}_3$/$\text{ZrO}_2$/$\text{SiO}_2$ catalyst was evaluated for 5 cycles of 24 h. When using 96% ethanol, the butadiene-1,3 yield decreased from 25.1% to 13.8% during the full cycle. Oxidation regeneration of the catalyst makes it possible to completely restore its catalytic activity. |
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| ISSN: | 1878-1543 |