The conversion of ethanol over 3d-metal saponite-like smectites
- The replacement of fossil fuel processes with renewable pathways is critical to circumvent climate change and environmental risks. A process of interest is the production of 1,3-butadiene (BD), which is primarily derived as a by-product of naphtha steam cracking. A sustainable alternative path involves converting renewable ethanol to BD via the Lebedev process, which requires a catalyst with balanced redox, acidic, and basic sites. Due to the necessity of a multifunctional catalyst, existing materials for this reaction are either comprised of catalyst mixtures or supported catalysts. In this study, we introduce a bulk material, saponite, containing M–O–Si sites, which combine required catalytic sites for the ethanol to BD (ETB) reaction in one material. The product composition in ethanol conversion were strongly dependent on the type of 3d-metal used, while no conclusive correlation between surface properties, conversion, and product composition was observed. Herein, using V-Sap*, weThe replacement of fossil fuel processes with renewable pathways is critical to circumvent climate change and environmental risks. A process of interest is the production of 1,3-butadiene (BD), which is primarily derived as a by-product of naphtha steam cracking. A sustainable alternative path involves converting renewable ethanol to BD via the Lebedev process, which requires a catalyst with balanced redox, acidic, and basic sites. Due to the necessity of a multifunctional catalyst, existing materials for this reaction are either comprised of catalyst mixtures or supported catalysts. In this study, we introduce a bulk material, saponite, containing M–O–Si sites, which combine required catalytic sites for the ethanol to BD (ETB) reaction in one material. The product composition in ethanol conversion were strongly dependent on the type of 3d-metal used, while no conclusive correlation between surface properties, conversion, and product composition was observed. Herein, using V-Sap*, we achieved an ethene productivity of 448 gethene kgcat−1 h−1 (74%) at 573.15 K. High acetaldehyde productivity was maintained with Cu-Sap* (466 gAcA kgcat−1 h−1, 49%) at 573.15 K and Zn-Sap (528 gAcA kgcat−1 h−1, 55%) at 723.15 K. Mg-Sap primarily produced ethene but also yielded 10 gBD kgcat−1 h−1 BD at 723.15 K. Higher BD outputs were observed with Ni-Sap (31 gBD kgcat−1 h−1 at 523.15 K) and Mn-Sap* (51 gBD kgcat−1 h−1 at 723.15 K). This underscores the potential of saponite-based materials for flexible product outputs in ethanol conversion, influenced by the choice of integrated 3d-metal.…


| Author: | Marc GreuelORCiD, Clara Maria Watermann, Heiko Lohmann, Stefan KaluzaORCiD, Ulf-Peter ApfelORCiD, Barbara Zeidler-Fandrich |
|---|---|
| Qualitätssicherung: | peer reviewed |
| open access: | Gold - Erstveröffentlichung mit Lizenzhinweis |
| Research fields: | Materialien / Materialien - Allgemein |
| Fachbereich/Einrichtung: | Hochschule Düsseldorf / Fachbereich - Maschinenbau und Verfahrenstechnik |
| Document Type: | Article |
| Year of Completion: | 2025 |
| Language of Publication: | English |
| Publisher: | Royal Society of Chemistry |
| Parent Title (English): | Materials Advances |
| Issue: | 6 |
| Page Number: | 14 |
| First Page: | 2885 |
| Last Page: | 2898 |
| URN: | urn:nbn:de:hbz:due62-opus-52973 |
| DOI: | https://doi.org/10.1039/d4ma01036a |
| ISSN: | 2633-5409 |
| GND Keyword: | Butadien; Katalyse; Material |
| Information on the Research Data: | All data supporting the findings can be found in the article and ESI,† or is available from the authors upon request. |
| Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 International |
| Release Date: | 2025/05/21 |
