Interaction of vanadium containing catalysts with microwaves and their activation in oxidative dehydrogenation of ethane

Sinev, Ilya; Kardash, T. Yu.; Kramareva, N. V.; Sinev, M. Yu.; Ткаченко, О. П.; Кучеров, А. В.; Kustov, L. М.

doi:10.1016/j.cattod.2008.04.021

Cited by 20 publications

(10 citation statements)

References 10 publications

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“…Phase transition of catalyst [78] o-Xylene/toluene oxidation Higher conversion, higher selectivity Hot-spot formation, more homogeneous dispersion of metallic particle b) [66] 2-Methylpentane isomerization Higher conversion, higher selectivity…”

Section: Methane Decompositionmentioning

confidence: 98%

“…One of the recent investigations on microwave application for a heterogeneous gas-solid system was performed by Sinev [78]. This comparative study on dehydrogenation of ethane over vanadium-based catalysts under conventional and microwave heating showed that, depending on the composition of the catalyst, different conclusions regarding the influence of microwave irradiation could be drawn.…”

Section: Methane Decompositionmentioning

confidence: 99%

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Microwaves in Heterogeneous Gas‐Phase Catalysis: Experimental and Numerical Approaches

2009

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This review paper focuses on the effects of microwave irradiation on heterogeneous gas phase catalytic reaction systems. Both experimental and modeling approaches are discussed. The currently available methods for temperature measurements in the microwave heating of solid particles are critically examined. The existence of microwave-created temperature gradients in beds of solid particles is discussed. The not fully established mechanism of catalyst (nano)particle heating and imperfect temperature measurement techniques implicate that different effects are often observed and contradictory conclusions are drawn. For further progress here, the development of accurate and possibly non-invasive techniques for local temperature measurements under microwave irradiation is needed.

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Section: Methane Decompositionmentioning

confidence: 98%

Section: Methane Decompositionmentioning

confidence: 99%

Microwaves in Heterogeneous Gas‐Phase Catalysis: Experimental and Numerical Approaches

2009

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“…In the case of ODH, the use of MWs is even more interesting, because the non-uniform heat distribution creates hot zones in which dehydrogenation in promoted and colder zones in which partial oxidation is promoted. Sinev et al investigated the effect of MWs on the ODH of ethane over a series of Vanadium-based mixed oxides: they reported that when V is combined to Sb, microwave irradiation has only a thermal effect but, when V is combined to Mo, MWs heating allows for the formation of modified phases and unusual oxidation states of cations which are not accessible under conventional thermal heating [137]. These changes led to different catalytic performances in the presence of MWs and conventional heating (CH), with a promoting effect for MWs heating.…”

Section: Dehydrogenation Applied To Chemicals Productionmentioning

confidence: 99%

Microwaves and Heterogeneous Catalysis: A Review on Selected Catalytic Processes

et al. 2020

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Since the late 1980s, the scientific community has been attracted to microwave energy as an alternative method of heating, due to the advantages that this technology offers over conventional heating technologies. In fact, differently from these, the microwave heating mechanism is a volumetric process in which heat is generated within the material itself, and, consequently, it can be very rapid and selective. In this way, the microwave-susceptible material can absorb the energy embodied in the microwaves. Application of the microwave heating technique to a chemical process can lead to both a reduction in processing time as well as an increase in the production rate, which is obtained by enhancing the chemical reactions and results in energy saving. The synthesis and sintering of materials by means of microwave radiation has been used for more than 20 years, while, future challenges will be, among others, the development of processes that achieve lower greenhouse gas (e.g., CO 2 ) emissions and discover novel energy-saving catalyzed reactions. A natural choice in such efforts would be the combination of catalysis and microwave radiation. The main aim of this review is to give an overview of microwave applications in the heterogeneous catalysis, including the preparation of catalysts, as well as explore some selected microwave assisted catalytic reactions. The review is divided into three principal topics: (i) introduction to microwave chemistry and microwave materials processing; (ii) description of the loss mechanisms and microwave-specific effects in heterogeneous catalysis; and (iii) applications of microwaves in some selected chemical processes, including the preparation of heterogeneous catalysts.A chemical process is conventionally energized by means of conductive heating with a steam boiler as a typical heat source. Nevertheless, a large variety of other forms of energy can be applied for PI, including ultrasounds (for reactions or crystal nucleation), light (in photocatalytic processes), electric fields (in extraction or for orientation of molecules), or microwaves. The microwave (dielectric) heating of materials has been known for a long time, and microwave ovens have been developed from more than 60 years. The studies by Gedye et al. in 1986 and 1988 [3,4] opened a period of very intensive investigation of the microwave effects on chemical reactions in homogeneous systems. Since then, hundreds of research papers have been published, and research has also expanded toward heterogeneous catalysis and its related chemical processes. This review gives an overview of the application of microwave technology to heterogeneous catalysis, including various chemical processes, as well as to the preparation of catalysts.

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“…Sinev et al investigated the oxidative dehydrogenation (ODH) of ethane to ethylene with VSb and VMo oxide catalysts under conventional and microwave-assisted conditions [99].…”

Section: Oxidative Dehydrogenation Of Hydrocarbonsmentioning

confidence: 99%

Gaseous Reactants in Microwave‐Assisted Synthesis

Stolle

Scholz

Ondruschka

2012

Microwaves in Organic Synthesis

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Interaction of vanadium containing catalysts with microwaves and their activation in oxidative dehydrogenation of ethane

Cited by 20 publications

References 10 publications

Microwaves in Heterogeneous Gas‐Phase Catalysis: Experimental and Numerical Approaches

Microwaves in Heterogeneous Gas‐Phase Catalysis: Experimental and Numerical Approaches

Microwaves and Heterogeneous Catalysis: A Review on Selected Catalytic Processes

Gaseous Reactants in Microwave‐Assisted Synthesis

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