Hydrogen formation during dehydrogenation of C2–C4 alkanes in the presence of oxygen: oxidative or non-oxidative?

Sinev, M. Yu.; Fattakhova, Z. T.; Tulenin, Yurii P.; Stennikov, Pavel S.; Vislovskii, V. P.

doi:10.1016/s0920-5861(03)00123-8

Cited by 22 publications

(16 citation statements)

References 10 publications

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“…Under these conditions, a relevant contribution www.elsevier.com/locate/apcata Applied Catalysis A: General 307 (2006) [148][149][150][151][152][153][154][155] of catalytic dehydrogenation to the alkene and H 2 formation cannot be excluded. Recent papers confirm that considerable amounts of H 2 are produced with vanadium oxide-based catalysts, under conditions typically employed for propane ODH [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 94%

“…For instance, it was found that when running ethane ODH, Mo 19 V 5 Nb 1 O x and V 5 Nb 1 O x were active to a certain extent in the WGS reaction at 440-500 8C [18]. Sinev et al [13] considered non-oxidative dehydrogenation and coking as the most important hydrogen formation pathways in propane oxidation. Moreover, it was supposed that other reactions were involved, generally indicated as freeradical oxidations; however, due to the lack of data reporting CO and CO 2 separately, it is difficult to understand if WGS occurred at all.…”

Section: The Activity Of V 2 O 3 In the Wgs Reactionmentioning

confidence: 99%

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The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

Ballarini

Battisti

Cavani

et al. 2006

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 94%

Section: The Activity Of V 2 O 3 In the Wgs Reactionmentioning

confidence: 99%

The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

Ballarini

Battisti

Cavani

et al. 2006

Applied Catalysis A: General

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“…9−15 It was suggested that the main pathways for hydrogen formation during ODH are nonoxidative dehydrogenation, coking, and free radical reaction. 9,11 Thermodynamic calculations associated with the main ODH and NODH reactions are reported in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Nonoxidative and Oxidative Propane Dehydrogenation over Bimetallic Mo–Ni/Al₂O₃ Catalyst

Siahvashi

Chesterfield

Adesina

2013

Ind. Eng. Chem. Res.

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Propane nonoxidative and oxidative dehydrogenation reactions were investigated over bimetallic alumina supported Mo–Ni catalyst in a quartz fixed-bed reactor at 0.1 MPa within the temperature range of 773–973 K. Time-on-stream analysis showed that Mo–Ni catalyst is stable at 4 h reaction time during ODH, while it significantly deactivated during NODH due to heavy carbon deposition confirmed by TOC. Hydrogen production was considerable during both reactions. C3H6 production rate is significantly higher during NODH at T > 823 K. An increase of the propane partial pressure resulted in a decrease in propane conversion to 83.2%, and selectivity to C3H6 significantly enhanced from 7.1 to 16.3%. An increase in oxygen partial pressure increased propane conversion from 74 to 95%, while the selectivity to C3H6 was considerably diminished at 923 K.

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“…Under these conditions, a relevant contribution of catalytic dehydrogenation to H 2 formation cannot be excluded. Recent papers confirm that considerable amounts of H 2 are produced with vanadium oxidebased catalysts, under conditions that are typically employed for alkanes ODH [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

The oxygen-assisted transformation of propane to COx/H2 through combined oxidation and WGS reactions catalyzed by vanadium oxide-based catalysts

et al. 2006

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This paper reports about the gas-phase oxidation of propane catalyzed by bulk vanadium oxide and by alumina-and silica-supported vanadium oxide. The reaction was studied with the aim of finding conditions at which the formation of H 2 and CO 2 is preferred over that of CO, H 2 O and of products of alkane partial oxidation. It was found that with bulk V 2 O 5 considerable amounts of H 2 are produced above 400 8C, the temperature at which the limiting reactant, oxygen, is totally consumed. The formation of H 2 derived from the combination of: (i) oxidation reactions, with generation of CO, CO 2 , oxygenates (mainly acetic acid), propylene and H 2 O, all occurring in the fraction of catalytic bed that operated in the presence of gas-phase oxygen, and (ii) WGS reaction, propane dehydrogenation and coke formation, that instead occurred in the fraction of bed operating under anaerobic conditions. This combination of different reactions in a single catalytic bed was possible because of the reduction of V 2 O 5 to V 2 O 3 at high temperature, in the absence of gas-phase oxygen. In fact, vanadium sesquioxide was found to be an effective catalyst for the WGS, while V 2 O 5 was inactive in this reaction. The same combination of reactions was not possible when vanadium oxide was supported over high-surface area silica or alumina; this was attributed to the fact that in these catalysts vanadium was not reduced below the oxidation state V 4+ , even under reaction conditions leading to total oxygen conversion. In consequence, these catalysts produced less H 2 than bulk vanadium oxide.

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Hydrogen formation during dehydrogenation of C2–C4 alkanes in the presence of oxygen: oxidative or non-oxidative?

Cited by 22 publications

References 10 publications

The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

Nonoxidative and Oxidative Propane Dehydrogenation over Bimetallic Mo–Ni/Al₂O₃ Catalyst

The oxygen-assisted transformation of propane to COx/H2 through combined oxidation and WGS reactions catalyzed by vanadium oxide-based catalysts

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Hydrogen formation during dehydrogenation of C2–C4 alkanes in the presence of oxygen: oxidative or non-oxidative?

Cited by 22 publications

References 10 publications

The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

The combination of propane partial oxidation and of WGS reaction in a single catalytic bed, and the self-adapting catalytic properties of vanadium oxide catalyst

Nonoxidative and Oxidative Propane Dehydrogenation over Bimetallic Mo–Ni/Al2O3 Catalyst

The oxygen-assisted transformation of propane to COx/H2 through combined oxidation and WGS reactions catalyzed by vanadium oxide-based catalysts

Contact Info

Product

Resources

About

Nonoxidative and Oxidative Propane Dehydrogenation over Bimetallic Mo–Ni/Al₂O₃ Catalyst