Nature of the Active Sites of Ferrospheres in the Oxidative Condensation of Methane

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1134/S0023158415040023

Ключевые слова: oxidative condensation of methane, ferrospheres, iron spinel, Mossbauer spectroscopy, structural defects, ferrospheres, iron spinel, Mossbauer spectroscopy, oxidative condensation of methane, structural defects

Аннотация: The catalytic properties of ferrospheres containing 76-97 wt % Fe2O3 in the oxidative condensation of methane were compared with their phase composition and the distribution of iron cations over the crystallographic positions of iron-containing phases in a steady state. It was established that the reaction route of methane oxidation changed at a Fe2O3 content of 89 wt %. Deep oxidation was the main reaction route on ferrospheres with a Fe2O3 content of = 89 wt %, the yield of C-2 hydrocarbons sharply increased and the contribution of deep oxidation decreased. The yield of C-2 hydrocarbons correlated with the amount of defects in the structure of iron spinel, which are iron ions with the tetrahedral cation of Ca2+ and the octahedral cation vacancy among the nearest neighbors.

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Издание

Журнал: KINETICS AND CATALYSIS

Выпуск журнала: Vol. 56, Is. 4

Номера страниц: 523-531

ISSN журнала: 00231584

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Anshits A.G. (Siberian Federal University)
  • Anshits N.N. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
  • Rabchevskii E.V. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
  • Vereshchagin S.N. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
  • Bayukov O.A. (Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences)
  • Pletnev O.N. (Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences)
  • Kondratenko E.V. (Leibniz Institute for Catalysis, University of Rostock)

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