Oxidative dehydrogenation of ethane on promoted VPO catalysts

Solsona, Benjamín; Zazhigalov, V. A.; Nieto, J.M. López; Bacherikova, I. V.; Diyuk, O. A.

doi:10.1016/s0926-860x(03)00178-9

Cited by 55 publications

(33 citation statements)

References 37 publications

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“…This is the case for VPO [35][36][37][38] or pyridine exchanged molybdovanadophosphoric acid [39] catalysts, in which partial oxidation products, i.e., maleic anhydride or acrylic acid, were obtained during the oxidation of n-butane [35,39] or propane [36,39], respectively, while ethylene was mainly obtained during the oxidation of ethane on VPO [37][38][39]. However, it can be noted that the selectivity to ethylene obtained on MoVTeNbO catalysts is higher than that reported previously on VPO [35][36][37][38] or pyridine-exchanged molybdovanadophosphoric acid catalysts [39]. So, the most selective MoVTeNbO catalysts present a very low reactivity in the oxidation of ethylene.…”

Section: Discussionmentioning

confidence: 86%

Selective oxidative dehydrogenation of ethane on MoVTeNbO mixed metal oxide catalysts

Botella

2004

Journal of Catalysis

236

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Section: Discussionmentioning

confidence: 86%

Selective oxidative dehydrogenation of ethane on MoVTeNbO mixed metal oxide catalysts

Botella

2004

Journal of Catalysis

236

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“…[6] For smaller alkanes, this catalyst is much less efficient. [7] Therefore, lots of attention has been devoted to the search for improved vanadia-based catalysts for the ODH of ethane and propane. [8] Complementary research has focused on the geometric structure of supported vanadia catalysts and especially how structure can be related to catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Role of dispersion of vanadia on SBA-15 in the oxidative dehydrogenation of propane

et al. 2010

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A series of vanadia catalysts supported on the mesoporous silica SBA-15 are synthesized using an automated laboratory reactor. The catalysts contain from 0.6 up to 13.6V atoms/nm 2 and are structurally characterized by various techniques (BET, XRD, SEM, TEM, Raman, IR, UV/Vis).Samples containing up to 3.1V/nm 2 are structurally rather similar. They all contain a mixture of tetrahedral (VOx)n species, both monomeric and oligomeric. The ratio of monomeric and oligomeric species depends on the vanadia loading. At the highest loading of 13.6V/nm 2 , in addition to tetrahedral (VOx)n, also substantial amounts of three-dimensional, bulk-like V2O5 are present in the catalyst. The structural similarity of the lowloaded catalysts is reflected in their alike catalytical activity during the oxidative dehydrogenation (ODH) of propane between 380 and 480 °C. Propene, CO, and CO2 are formed as reaction products, while neither the formation of ethene nor acrolein or acrylic acid is observed in other than trace amounts. The activation energy for ODH of propane is 140 kJ/mol. The catalyst with the highest loading yields varying activation energies for different reaction conditions, which is probably related to rearrangements between bulk-like and dispersed, two-dimensional (VOx)n. Rather than the monomer to oligomer ratio, the ratio of two-dimensional to three-dimensional vanadia seems to be crucial for the catalytic properties of silica supported vanadia in the ODH of propane.

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“…60% at a butane conversion degree of 80% is actually obtained) [8]. However, this catalyst seems to be not so effective in the oxidative activation of C 2 -C 3 alkanes [9,10]. Table 1 shows comparatively the worldwide production of some of the most important olefins and partial oxidation products [11], being ethylene and acrylonitrile (ACN) the most important compounds as feedstock and chemical product, respectively.…”

Section: Introductionmentioning

confidence: 99%

The selective oxidative activation of light alkanes. From supported vanadia to multicomponent bulk V-containing catalysts

Nieto

2006

Top Catal

113

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V-containing materials have been proposed as active and selective catalysts in the selective oxidative transformation of C 2 -C 4 alkanes to the corresponding olefins, oxygenates and nitriles. Although vanadium ions are generally assumed as the active sites in the oxidative activation of short chain alkanes, the coordination, the oxidation state and the environment of V atoms strongly influence both the catalytic activity and the nature of the reaction products. A comparative study on the catalytic behaviour of V-containing catalysts, i.e. metal vanadates, supported vanadium oxides, V-containing microporous/mesoporous materials and multicomponent bulk Mo-V-Te(Sb)-Nb mixed metal oxides, on the alkane oxidation is presented. The influence of the structure (including the V-coordination and V-environment) and the physico-chemical properties (especially redox and acid-base characteristics) of the catalysts on their behaviour in the selective oxidation of paraffins and alkenes is discussed.KEY WORDS: activation of light alkanes by vanadia catalysts; selective oxidative oxidation of light alkanes.

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Oxidative dehydrogenation of ethane on promoted VPO catalysts

Cited by 55 publications

References 37 publications

Selective oxidative dehydrogenation of ethane on MoVTeNbO mixed metal oxide catalysts

Selective oxidative dehydrogenation of ethane on MoVTeNbO mixed metal oxide catalysts

Role of dispersion of vanadia on SBA-15 in the oxidative dehydrogenation of propane

The selective oxidative activation of light alkanes. From supported vanadia to multicomponent bulk V-containing catalysts

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