Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles
The nonoxidative conversion of ethanol to acetaldehyde under thermal and microwave heating was studied on mixed oxide ZnO-CuO-SiO<sub>2</sub> catalysts modified with additives of tungsten carbide nanoparticles. The results revealed that the WC-modified catalyst exhibited superior activit...
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| Formato: | Artigo |
| Idioma: | English |
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MDPI AG
2021-03-01
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| coleção: | Molecules |
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| Acesso em linha: | https://www.mdpi.com/1420-3049/26/7/1955 |
| _version_ | 1827696339190808576 |
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| author | Alexander L. Kustov Andrey L. Tarasov Olga P. Tkachenko Igor V. Mishin Gennady I. Kapustin Leonid M. Kustov |
| author_facet | Alexander L. Kustov Andrey L. Tarasov Olga P. Tkachenko Igor V. Mishin Gennady I. Kapustin Leonid M. Kustov |
| author_sort | Alexander L. Kustov |
| collection | DOAJ |
| description | The nonoxidative conversion of ethanol to acetaldehyde under thermal and microwave heating was studied on mixed oxide ZnO-CuO-SiO<sub>2</sub> catalysts modified with additives of tungsten carbide nanoparticles. The results revealed that the WC-modified catalyst exhibited superior activity and selectivity under microwave heating conditions. It is assumed that when microwave heating is used, hot zones can appear at the contact points of WC nanoparticles and active centers of the mixed oxide ZnO-CuO-SiO<sub>2</sub> catalyst, which intensively absorb microwave energy, allowing the more efficient formation of acetaldehyde at moderate temperatures. Thermodynamic calculations of equilibrium concentrations of reagents and products allowed us to identify the optimal conditions for effective acetaldehyde production. The initial catalyst and the catalyst prepared by the coprecipitation of the oxides with the addition of WC were characterized by physicochemical methods (TPR-H<sub>2</sub>, XRD, DRIFTS of adsorbed CO). The active centers of the oxide catalyst can be Cu<sup>+</sup> cations. |
| first_indexed | 2024-03-10T12:45:17Z |
| format | Article |
| id | doaj.art-30052271af064c18afe0b79065bb4291 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T12:45:17Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-30052271af064c18afe0b79065bb42912023-11-21T13:30:31ZengMDPI AGMolecules1420-30492021-03-01267195510.3390/molecules26071955Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC NanoparticlesAlexander L. Kustov0Andrey L. Tarasov1Olga P. Tkachenko2Igor V. Mishin3Gennady I. Kapustin4Leonid M. Kustov5N.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaN.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaN.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaN.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaN.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaN.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, RussiaThe nonoxidative conversion of ethanol to acetaldehyde under thermal and microwave heating was studied on mixed oxide ZnO-CuO-SiO<sub>2</sub> catalysts modified with additives of tungsten carbide nanoparticles. The results revealed that the WC-modified catalyst exhibited superior activity and selectivity under microwave heating conditions. It is assumed that when microwave heating is used, hot zones can appear at the contact points of WC nanoparticles and active centers of the mixed oxide ZnO-CuO-SiO<sub>2</sub> catalyst, which intensively absorb microwave energy, allowing the more efficient formation of acetaldehyde at moderate temperatures. Thermodynamic calculations of equilibrium concentrations of reagents and products allowed us to identify the optimal conditions for effective acetaldehyde production. The initial catalyst and the catalyst prepared by the coprecipitation of the oxides with the addition of WC were characterized by physicochemical methods (TPR-H<sub>2</sub>, XRD, DRIFTS of adsorbed CO). The active centers of the oxide catalyst can be Cu<sup>+</sup> cations.https://www.mdpi.com/1420-3049/26/7/1955catalysisacetaldehydecopper oxideethanoldehydrogenationtungsten carbide |
| spellingShingle | Alexander L. Kustov Andrey L. Tarasov Olga P. Tkachenko Igor V. Mishin Gennady I. Kapustin Leonid M. Kustov Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles Molecules catalysis acetaldehyde copper oxide ethanol dehydrogenation tungsten carbide |
| title | Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles |
| title_full | Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles |
| title_fullStr | Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles |
| title_full_unstemmed | Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles |
| title_short | Ethanol to Acetaldehyde Conversion under Thermal and Microwave Heating of ZnO-CuO-SiO<sub>2</sub> Modified with WC Nanoparticles |
| title_sort | ethanol to acetaldehyde conversion under thermal and microwave heating of zno cuo sio sub 2 sub modified with wc nanoparticles |
| topic | catalysis acetaldehyde copper oxide ethanol dehydrogenation tungsten carbide |
| url | https://www.mdpi.com/1420-3049/26/7/1955 |
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