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Keywords = catalyst Mo-V-Te-Nb-Ox

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9 pages, 2464 KB  
Article
Microwave Heating of the Catalyst Bed as a Way of Energy-Saving Oxidative Dehydrogenation of Ethane on a Mo-V-Te-Nb-Ox Catalyst
by Alexei V. Kucherov, Nikolai A Davshan, Elena D. Finashina and Leonid Kustov
Nanomaterials 2022, 12(24), 4459; https://doi.org/10.3390/nano12244459 - 15 Dec 2022
Cited by 3 | Viewed by 2127
Abstract
In search of a more effective process of ethane oxidative hydrogenation, different operation modes (thermal and microwave heating) are compared. The catalyst Mo1-V0.3-Te0.13-Nb0.11-Ox was prepared by hydrothermal synthesis and characterized by a set of [...] Read more.
In search of a more effective process of ethane oxidative hydrogenation, different operation modes (thermal and microwave heating) are compared. The catalyst Mo1-V0.3-Te0.13-Nb0.11-Ox was prepared by hydrothermal synthesis and characterized by a set of physicochemical methods (XRD, N2 adsorption, SEM, EDX). The direct microwave heating of the catalyst layer is proposed as an alternative way of energy-saving ethane-to-ethylene oxidation by a Mo-V-Te-Nb-Ox system. A substantial decrease in the reactor temperature upon the microwave-assisted process is accompanied by extremely high catalyst selectivity, which remains at a very high level of 98+%. Full article
(This article belongs to the Special Issue Chemical-Physical Properties and Applications of Nano-Scaled Oxides)
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15 pages, 2586 KB  
Review
Characterization of MoVTeNbOx Catalysts during Oxidation Reactions Using In Situ/Operando Techniques: A Review
by Soe Lwin, Weijian Diao, Chinmoy Baroi, Anne M. Gaffney and Rebecca R. Fushimi
Catalysts 2017, 7(4), 109; https://doi.org/10.3390/catal7040109 - 8 Apr 2017
Cited by 22 | Viewed by 8325
Abstract
Light alkanes are abundant in shale gas resources. The bulk mixed metal oxide MoVTe(Sb)NbOx catalysts play a very important role in dehydrogenation and selective oxidation reactions of these short hydrocarbons to produce high-value chemicals. This catalyst system mainly consists of M1 and [...] Read more.
Light alkanes are abundant in shale gas resources. The bulk mixed metal oxide MoVTe(Sb)NbOx catalysts play a very important role in dehydrogenation and selective oxidation reactions of these short hydrocarbons to produce high-value chemicals. This catalyst system mainly consists of M1 and less-active M2 crystalline phases. Due to their ability to directly monitor the catalysts under the relevant industrial conditions, in situ/operando techniques can provide information about the nature of active sites, surface intermediates, and kinetics/mechanisms, and may help with the synthesis of new and better catalysts. Sophisticated catalyst design and understanding is necessary to achieve the desired performance (activity, selectivity, lifetime, etc.) at reasonable reaction conditions (temperature, pressure, etc.). This article critically reviews the progress made in research of these MoVTe(Sb)NbOx catalysts in oxidation reactions mainly through in situ/operando techniques and suggests the future direction needed to realize the industrialization of these catalysts. Full article
(This article belongs to the Special Issue In Situ and Operando Characterization in Catalysis)
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