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Activity, Selectivity and Initial Degradation of Iron Molybdate in the Oxidative Dehydrogenation of Ethanol

Oefner, Niklas ; Heck, Franziska ; Dürl, Marcel ; Schumacher, Leon ; Siddiqui, Humera Khatoon ; Kramm, Ulrike I. ; Hess, Christian ; Möller, Angela ; Albert, Barbara ; Etzold, Bastian J. M. (2024)
Activity, Selectivity and Initial Degradation of Iron Molybdate in the Oxidative Dehydrogenation of Ethanol.
In: ChemCatChem, 2021, 14 (4)
doi: 10.26083/tuprints-00026666
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Activity, Selectivity and Initial Degradation of Iron Molybdate in the Oxidative Dehydrogenation of Ethanol
Language: English
Date: 24 April 2024
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: ChemCatChem
Volume of the journal: 14
Issue Number: 4
Collation: 8 Seiten
DOI: 10.26083/tuprints-00026666
Corresponding Links:
Origin: Secondary publication service
Abstract:

Iron molybdate catalysts are applied in the industrial FormOx process to produce formaldehyde by oxidative dehydrogenation (ODH) of methanol. Only few studies are available about the applicability of iron molybdate catalysts for the ODH of ethanol to produce acetaldehyde. Herein, an iron molybdate synthesized by co-precipitation (p) and an iron molybdate prepared by a ball-milling solid-state synthesis (bm) are applied as ethanol ODH catalysts. Both materials show attractive acetaldehyde selectivites of >90 % (280 °C: p-Fe₂(MoO₄)₃: YAcH=90.3 %; bm-Fe₂(MoO4)₃: YAcH=60.4 %) and a stable performance. The bulk composition and crystal structure could be confirmed by various characterization techniques and is maintained during ethanol ODH. XPS reveals an enrichment of Mo on the catalyst surface which is slightly decreasing after the catalytic tests. This observation could be a first sign of long-term deactivation like known from methanol ODH. Comparing the performance of both materials, p-Fe₂(MoO₄)₃ shows higher activity and aldehyde selectivity. We propose the higher Mo/Fe surface ratio and the lower acidity to be the reasons for these differences.

Uncontrolled Keywords: acetaldehyde, dehydrogenation, ethanol, heterogeneous catalysis, iron molybdate
Identification Number: Artikel-ID: e202101219
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-266668
Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Catalysts and Electrocatalysts
07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry
07 Department of Chemistry > Ernst-Berl-Institut > Fachgebiet Technische Chemie > Technische Chemie I
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1487: Iron, upgraded!
Date Deposited: 24 Apr 2024 12:39
Last Modified: 08 Aug 2024 08:08
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/26666
PPN: 520410661
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