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A comparative FMR study of the reduction of Co-containing catalysts for the Fischer–Tropsch process in hydrogen and supercritical isopropanol

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Abstract

An in situ comparative study of the reduction of Co-containing catalysts for the Fischer–Tropsch process in hydrogen and supercritical (SC) isopropanol is performed by ferromagnetic resonance (FMR) spectroscopy. According to the FMR data, the reduction of cobalt-containing oxide particles to metal in hydrogen starts at temperatures of ~360°C, which is substantially lower than a temperature of the formation of metal particles of the active phase according to powder X-ray diffraction and differential thermogravimetry data (Т ~ 450°C). In SC isopropanol, the reduction to Co metal occurs at lower temperatures (T ~ 245°C) as compared with the reduction temperature for these catalysts in hydrogen. It is shown that the reduction in SC isopropanol can lead to the formation of superparamagnetic Co nanoparticles with a narrow particle size distribution.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    N. S. Nesterov, I. I. Simentsova, V. F. Yudanov & O. N. Martyanov

  2. Novosibirsk National Research State University (Research and Educational Center for Energy-Efficient Catalysis), Novosibirsk, Russia

    O. N. Martyanov

Authors
  1. N. S. Nesterov
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  2. I. I. Simentsova
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  3. V. F. Yudanov
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  4. O. N. Martyanov
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Correspondence to N. S. Nesterov.

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Original Russian Text © 2016 N. S. Nesterov, I. I. Simentsova, V. F. Yudanov, O. N. Martyanov.

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Nesterov, N.S., Simentsova, I.I., Yudanov, V.F. et al. A comparative FMR study of the reduction of Co-containing catalysts for the Fischer–Tropsch process in hydrogen and supercritical isopropanol. J Struct Chem 57, 90–96 (2016). https://doi.org/10.1134/S0022476616010108

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  • DOI: https://doi.org/10.1134/S0022476616010108

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