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Grzybowska-S̈wierkosz, B.

doi:10.1023/a:1020547830167

Cited by 84 publications

(44 citation statements)

References 55 publications

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“…The process had no thermodynamic limitations and prevented the growth of carbonaceous deposits over the catalyst 9 . The development of active and selective catalytic materials for the oxidative dehydrogenation of light alkanes to their corresponding alkenes has been the focal study point of many academic and industrial research groups [10][11][12][13][14][15][16][17][18][19] through which, usually, the Mars-van Krevelen mechanism was assumed for the ODHP reaction. To begin with, the propane reacted with the lattice oxygen of the oxidic catalyst, such as V 2 O 5 through which the first and then second hydrogen were abstracted from the hydrocarbon molecule.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Catalytic Performances of Nanostructured V2O5 over TiO2 and γ-Al2O3 for Oxidative Dehydrogenation of Propane

Kazemeini

Nikkhah

Fattahi

et al. 2016

Chem.Biochem.Eng.Q.

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Samples of V 2 O 5 catalysts supported on nanostructures of TiO 2 and γ-Al 2 O 3 were synthesized through the hydrothermal method and used for the oxidative dehydrogenation of propane (ODHP) to propylene. The TiO 2 support was utilized in both commercial microstructure and synthesized nanostructure forms. Moreover, the γ-Al 2 O 3 support was synthesized through chemical and precipitation methods. The vanadium catalyst was then deposited onto the hybrid of the TiO 2 and γ-Al 2 O 3 materials. All prepared catalysts were characterized through the BET, FESEM, FTIR, XRD and TPR techniques. Performances of the synthesized catalysts were subsequently examined in a fixed-bed reactor. The main products were propylene, ethylene and CO x . The prepared catalysts over TiO 2 and γ-Al 2 O 3 were evaluated under reactor test conditions of 500 °C, feed of C 3 H 8 /air with molar ratio of 0.6, and total feed flow rate of 90 mL min -1 . These resulted in optimum values of 35.53 and 23.88 % for the propylene selectivity and propane conversion, respectively 6 h after the start of the reaction. The comparison of performances made between the synthesized materials and those available in the open literature for the ODHP reaction was indeed satisfactory.

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Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Catalytic Performances of Nanostructured V2O5 over TiO2 and γ-Al2O3 for Oxidative Dehydrogenation of Propane

Kazemeini

Nikkhah

Fattahi

et al. 2016

Chem.Biochem.Eng.Q.

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“…Vanadium oxide based materials is an interesting group of catalysts which have been reported as selective in partial oxidation reactions of alkanes, alkenes and aromatic hydrocarbons [1][2][3][4][5] and, more recently, in the partial oxidation of H2S to sulphur [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Na0.33V2O5, which seems to be also active and selective during the partial oxidation of H2S to sulphur [14]. 4 In this way, the catalyst with a Na/V ratio of 0.04 was the more active one, in which both V2O5 and Na0.33V2O5 are observed in fresh catalyst but V4O9 and Na0.33V2O5 were observed after the catalytic tests [14]. So, an activation time is required in this case in order to achieve and stable and selective catalyst.…”

Section: Introductionmentioning

confidence: 99%

Catalytic behavior of NaV6O15 bronze for partial oxidation of hydrogen sulfide

et al. 2014

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ElsevierSoriano Rodríguez, MD.; Rodriguez-Castellon, E.; Garcia-Gonzalez, E.; López Nieto, JM. (2014). Catalytic behavior of NaV6O15 bronze for partial oxidation of hydrogen sulfide. Catalysis AbstractNa-containing V2O5 materials have been prepared hydrothermally from gels with Na/V ratios of 0.02 to 0.34, and calcined at 500ºC. The calcined samples have been characterized and tested as catalysts in the partial oxidation of H2S to elemental sulfur.At low Na-contents, V2O5 and NaV6O15 bronze are formed, with the NaV6O15/V2O5 ratio increasing with the Na-content. Pure NaV6O15 bronze is mainly formed from gels containing a Na/V ratio of 0.18. However, NaV6O15 and NaV3O8 bronzes are formed at from gels with Na/V ratio higher than 0.35. NaV6O15 based catalyst shows high conversion for the oxidation of H2S with a high selectivity into elemental sulfur. These catalysts are more active and stable than pure or Na-doped V2O5 catalysts. V4O9 is observed in used catalysts derived from pure and Na-doped V2O5 and materials containing NaV6O15/V2O5 mixtures. However, no changes in the NaV6O15 crystalline structure are observed in pure and NaV6O15/V2O5 mixtures catalysts. Accordingly, NaV6O15 crystalline phase is stable for several hours of catalysis at a difference with V2O5. The active sites in V-containing vanadium catalysts are probably V 5+ -O-V 4+ pairs as proposed for V4O9 crystalline phase. The best catalytic performances were achieved on V2O5-NaV6O15 mixtures which are transformed to V4O9-NaV6O15 mixtures during the catalytic tests. These catalytic results could be due to the intrinsic physical properties of both phases but also because of the optimal dispersion.Keywords: NaV 6 O 15 bronze, V 2 O 5 , V 4 O 9 , selective oxidation of hydrogen sulfide to sulfur, Na-doped vanadium oxide catalyst 3

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“…A number of assumptions on how the MoVTeNb catalyst works suggested [3][4][5] In the previous article, it has been described the reaction kinetics and mechanism of propane partial oxidation to acrylic acid on diluted MoVTeNbOx mixedoxide catalysts using high-throughput system (nanoflow reactor) [6]. This article more focus and deals with the similar reaction oxidation over diluted and leached MoVTeNbOx mixed-oxide catalysts.…”

Section: Introductionmentioning

confidence: 99%