Oxidative dehydrogenation of ethane over M1 MoVNbTeO catalysts modified by the addition of Nd, Mn, Ga or Ge

Lazareva, E. V.; Бондарева, В. М.; Svintsitskiy, Dmitry A.; Ищенко, А. В.; Marchuk, A. S.; Kovalev, E. P.; Kardash, T. Yu.

doi:10.1016/j.cattod.2019.12.029

Cited by 14 publications

(9 citation statements)

References 33 publications

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“…Consequently, a high yield of ethylene up to 75% and a productivity of up to 1770 g C 2 H 4 kg cat À1 h À1 were achieved 134,138 The selectivity and productivity of such catalyst can be significantly improved by tuning the V 5+ surface concentration, using the conductive supports, modification by Nd, Mn, Ge or Ga or realizing the process under supercritical conditions. [138][139][140][141] The latter makes it possible to achieve an ethylene productivity up to 288 g C 2 H 4 kg cat À1 h À1 at as low temperature as 280 1C. This is crucial for MoVTeNbO x , since the M1 structure may strongly deactivate at temperatures higher than 360 1C.…”

Section: Alkane Oxidative Dehydrogenationmentioning

confidence: 99%

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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Section: Alkane Oxidative Dehydrogenationmentioning

confidence: 99%

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

et al. 2022

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“…A recent study has shown that the addition of small amounts of gallium by impregnation significantly increases the selectivity to acrylic acid at low propane conversion. 24,26 This increase is related to the modification of the acid properties of the catalyst. The Cucontaining trigonal phase has been tested as a catalyst for the selective oxidation of acrolein to acrylic acid and appears to be very efficient for this reaction.…”

Section: Discussionmentioning

confidence: 99%

Effect of Introducing Thallium in Microporous Vanado-molybdate with Orthorhombic or Trigonal Structures and Catalytic Properties

Aouine

Millet

2022

J. Phys. Chem. C

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Thallium-containing mixed vanadium and molybdenum oxides have been synthesized using a microwave-assisted hydrothermal method. The pH, the nature of the metal precursors, and the use of a structuring agent were shown to be key parameters of the synthesis; depending upon these parameters, trigonal (Tri) or orthorhombic (M1) structures were obtained. Both structures have been characterized by X-ray diffraction (XRD) and scanning and transmission electron microscopies (SEM and TEM, respectively). The orthorhombic phase has lattice parameters of a = 2.108 nm, b = 2.656 nm, c = 0.3997 nm and space group Pba2, and the trigonal phase, lattice parameters of a = 2.143 nm, c = 0.4004 nm and space group P3. In the orthorhombic phase, both hexagonal and heptagonal channels are partially but consistently occupied by thallium cations. The trigonal phase also exhibited both hexagonal and heptagonal channels; hexagonal channels were occupied by thallium cations, whereas the heptagonal channels appeared almost empty. The catalytic properties of the solids have been studied for the oxidative dehydrogenation of ethane and the oxidation of propene to acrylic acid. The orthorhombic phase was inactive; the trigonal phase, while not very active, had a high selectivity to ethylene. Although the occupancy rate of the heptagonal sites is probably low in the later phase, it strongly attenuates its activity.

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“…7,9,30,32,33,43 Moreover, Sn or Nb promoted Ni metal oxides have an easy, quick, less energy demanding and reproducible synthesis method compared to the method used for synthesizing other promising materials for ODH-C 2 , including the well-known MoVNbTeO-based catalysts. 8,44–46 Yet, they are highly selective to ethylene under ODH-C 2 conditions (>80%). Regarding the SnO 2 –NiO formulation, it has exhibited its best performance operating under Ni/Sn atomic ratios between 11 and 20.…”

Section: Introductionmentioning

confidence: 99%

Unravelling the redox mechanism and kinetics of a highly active and selective Ni-based material for the oxidative dehydrogenation of ethane

et al. 2022

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Oxidative dehydrogenation of ethane over M1 MoVNbTeO catalysts modified by the addition of Nd, Mn, Ga or Ge

Cited by 14 publications

References 33 publications

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

Effect of Introducing Thallium in Microporous Vanado-molybdate with Orthorhombic or Trigonal Structures and Catalytic Properties

Unravelling the redox mechanism and kinetics of a highly active and selective Ni-based material for the oxidative dehydrogenation of ethane

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