Effect of additives on properties of V2O5/SiO2 and V2O5/MgO catalysts

Klisińska, A.; Loridant, S.; Grzybowska, B.; Stoch, J.; Gressel, I.

doi:10.1016/j.apcata.2006.04.040

Cited by 56 publications

(24 citation statements)

References 49 publications

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“…The Raman bands of Mn 2 O 3 were detected on the catalysts containing W at 571, Mo at 600, 695 cm À1 , V at 513, 557, 590, 601, 655, 678, Cr at 695, and Nb at 549, 579, 599, 650, 687 cm À1 . On V-Na-Mn/SiO 2 nanocatalyst, the broad bands observed between 820 and 920 cm À1 with maximum at about 875 cm À1 correspond to V-O stretching modes [22]. The V5 5O, Nb5 5O, Mo5 5O and W5 5O stretching modes are near 994, 976, 1010 and 1011 cm À1 , respectively [23].…”

Section: Fourier Transformed Infrared (Ftir) Spectroscopymentioning

confidence: 96%

Effect of promoter in the oxidative coupling of methane over synthesized Mn/SiO2 nanocatalysts via incipient wetness impregnation

Mahmoodi¹,

Ehsani²,

Ghoreishi³

2010

Journal of Industrial and Engineering Chemistry

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Section: Fourier Transformed Infrared (Ftir) Spectroscopymentioning

confidence: 96%

Effect of promoter in the oxidative coupling of methane over synthesized Mn/SiO2 nanocatalysts via incipient wetness impregnation

Mahmoodi¹,

Ehsani²,

Ghoreishi³

2010

Journal of Industrial and Engineering Chemistry

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“…Mainly mixed oxides of transition metals, especially vanadium oxide, supported on different supports, applied with oxygen as an oxidant, were considered as a perspective catalytic system [1,2]. Recently, iron modified zeolite of MFI structure has also appeared to be an efficient catalyst for ODH of ethane and propane, when used with nitrous oxide as an oxidant [3,4].…”

Section: Introductionmentioning

confidence: 99%

Oxydehydrogenation of Ethane and Propane over Alkaline Metal Modified Fe-ZSM-5 Zeolites

2010

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Iron modified zeolites of MFI structure, calcined at 873 and 1173 K, were doped with sodium cations in amounts corresponding to , , and to the total number of acidic centres, estimated from TPD of ammonia. Sodium modified Fe-ZSM-5(900) gradually lost their oxidative activity with an increase in the concentration of alkaline cations, while the activity of Na/Fe-ZSM-5(600) changed slightly and diminished considerably only after significant removal of acidic centres. The results of propane ODH reaction, performed at different contact times over alkaline free and alkaline modified Fe-ZSM-5 indicated, that oxydehydrogenation and cracking reactions on the samples calcined at 1173 K occurred as consecutive reactions, while in the presence of catalysts activated at 873 K, and characterised by strong acidic centres, both reactions occurred simultaneously.

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“…In part II [23], we will describe the effect of the additives on the structure and physicochemical properties of the two series of the catalysts and will attempt to correlate them with the catalytic performance. The molecular aspect of the effect of the additives to vanadia-based catalysts has been approached by quantum chemical calculations [24].…”

Section: Introductionmentioning

confidence: 99%