Rogg, Simone ; Hess, Christian (2025)
CO₂ as a soft oxidant for propane oxidative dehydrogenation: a mechanistic study using operando UV Raman spectroscopy.
In: Journal of CO2 Utilization, 2021, 50
doi: 10.26083/tuprints-00028222
Artikel, Zweitveröffentlichung, Postprint
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Kurzbeschreibung (Abstract)
The utilization of CO₂ as an oxidant has recently attracted increasing attention due to its mild oxidizing properties allowing higher product selectivities to be achieved e.g. in propane oxidative dehydrogenation (ODH). In this communication we address mechanistic aspects of propane ODH over silica supported vanadia (VOₓ/SiO₂) catalysts in the presence of CO₂ as oxidizing agent. The use of operando UV Raman spectroscopy reveals distinct changes in the surface vanadia structure including breakage of V-O-V bonds and a partial reduction of vanadyl, as well as the formation of support hydroxyl groups, while the presence of CO₂ is observed to prevent coke deposition. Our results are fully consistent with the occurrence of two parallel pathways, i.e., direct ODH (one step) and dehydrogenation followed by a reverse water-gas shift reaction (two step), supporting previous literature proposals.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2025 |
| Autor(en): | Rogg, Simone ; Hess, Christian |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | CO₂ as a soft oxidant for propane oxidative dehydrogenation: a mechanistic study using operando UV Raman spectroscopy |
| Sprache: | Englisch |
| Publikationsjahr: | 13 Januar 2025 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 5 Juni 2021 |
| Ort der Erstveröffentlichung: | Amsterdam [u.a.] |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of CO2 Utilization |
| Jahrgang/Volume einer Zeitschrift: | 50 |
| Kollation: | 24 Seiten |
| DOI: | 10.26083/tuprints-00028222 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28222 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | The utilization of CO₂ as an oxidant has recently attracted increasing attention due to its mild oxidizing properties allowing higher product selectivities to be achieved e.g. in propane oxidative dehydrogenation (ODH). In this communication we address mechanistic aspects of propane ODH over silica supported vanadia (VOₓ/SiO₂) catalysts in the presence of CO₂ as oxidizing agent. The use of operando UV Raman spectroscopy reveals distinct changes in the surface vanadia structure including breakage of V-O-V bonds and a partial reduction of vanadyl, as well as the formation of support hydroxyl groups, while the presence of CO₂ is observed to prevent coke deposition. Our results are fully consistent with the occurrence of two parallel pathways, i.e., direct ODH (one step) and dehydrogenation followed by a reverse water-gas shift reaction (two step), supporting previous literature proposals. |
| Freie Schlagworte: | Propylene, Oxidative dehydrogenation (ODH), CO₂, Reverse water-gas shift, Supported metal oxide, Vanadia, Operando Raman, Reaction mechanism |
| Status: | Postprint |
| URN: | urn:nbn:de:tuda-tuprints-282222 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 13 Jan 2025 12:25 |
| Letzte Änderung: | 14 Jan 2025 06:14 |
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| Suche nach Titel in: | TUfind oder in Google |
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- CO₂ as a soft oxidant for propane oxidative dehydrogenation: a mechanistic study using operando UV Raman spectroscopy. (deposited 13 Jan 2025 12:25) [Gegenwärtig angezeigt]
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