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Formation of an active surface on oxide systems containing vanadium used for dehydrogenation of hydrocarbons in the presence of hydrogen acceptors. 4. Catalytic and physicochemical properties of vanadium-zirconium and vanadium-titanium catalysts for the oxidative dehydrogenation of ethylbenzene in the presence of nitrobenzene

  • Physical Chemistry
  • Chemical Equilibrium. Kinetics. Catalysis. Adsorption
  • Published:
Bulletin of the Russian Academy of Sciences, Division of chemical science Aims and scope

Abstract

A study has been made of the catalytic and physicochemical properties of vanadium-zirconium and vanadium-titanium oxide systems in the oxidative dehydrogenation of ethylbenzene in the presence of nitrobenzene. The degree of conversion to styrene was less than 10% and to aniline 60%. The methods used to study the physicochemical properties of the catalysts were diffuse reflection electron spectroscopy (DRES), x-ray and differential thermogravimetric analysis. The presence of surface V 5+Td , V 5+Oh , and V 4+Q ions has been established, their ratios depending on the initial vanadium concentrations, the nature of the carrier, and the thermal treatment conditions. In the vanadium—zirconium systems V 5+Td predominate, but in the vanadium-titanium ones V 4+Q . The V 5+Oh ions appear to be present in the form of clusters. A chemical compound between the active components and ZrO2 and a V2O5 phase have been detected, which take no part in the dehydrogenation reaction.

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Authors
  1. I. P. Belomestnykh
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  2. E. A. Skrigan
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  3. N. N. Rozhdestvenskaya
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  4. G. V. Isagulyants
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Additional information

V. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117334. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 557–561, March, 1992.

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Belomestnykh, I.P., Skrigan, E.A., Rozhdestvenskaya, N.N. et al. Formation of an active surface on oxide systems containing vanadium used for dehydrogenation of hydrocarbons in the presence of hydrogen acceptors. 4. Catalytic and physicochemical properties of vanadium-zirconium and vanadium-titanium catalysts for the oxidative dehydrogenation of ethylbenzene in the presence of nitrobenzene. Russ Chem Bull 41, 439–442 (1992). https://doi.org/10.1007/BF00863057

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  • DOI: https://doi.org/10.1007/BF00863057

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