Synthesis, properties, and activity of MoVTeNbO catalysts modified by zirconia-pillared clays in oxidative dehydrogenation of ethane

Composites comprising MoVTeNbO mixed oxide and zirconia-pillared montmorillonite clays (PilCs) were prepared. XRD and TEM with EDX studies confirmed the preservation of M1 MoVTeNbO phase in these composites responsible for high activity and selectivity in ethane oxidative dehydrogenation into ethyle...

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Bibliographic Details
Published in:Open Chemistry 2021-04, Vol.19 (1), p.492-502
Main Authors: Shorayeva, Kamshat Abithanovna, Massalimova, Bakytgul Kabykenovna, Bespalko, Yulia Nikolaevna, Kovalev, Evgenii Pavlovich, Ishchenko, Arcady Vladimirovich, Sadykov, Vladislav Aleksandrovich
Format: Article
Language:English
Subjects:
composites with pillared clays
MoVTeNbO mixed oxide
oxidative dehydrogenation of ethane to ethylene
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Summary:Composites comprising MoVTeNbO mixed oxide and zirconia-pillared montmorillonite clays (PilCs) were prepared. XRD and TEM with EDX studies confirmed the preservation of M1 MoVTeNbO phase in these composites responsible for high activity and selectivity in ethane oxidative dehydrogenation into ethylene. For composites with PilC content of 10 wt%, the best ethylene yield exceeding that of bulk MoVTeNbO oxide was demonstrated for clays with zirconia pillars doped with Ce and Al possessing the highest specific surface area. This is explained by optimized chemical interaction of these clays with MoVTeNbO mixed oxide improving its bulk oxygen mobility and reactivity by structure disordering while blocking surface sites responsible for combustion due to the stabilization of the reactive terminal oxygen species.
ISSN:2391-5420
2391-5420
DOI:10.1515/chem-2021-0048