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Kinetics and Catalysis

, Volume 46, Issue 5, pp 719–723 | Cite as

Magnetic Methods in a Study of the Effect of the Pore Structure of Silica Gels on the Particle Size of Cobalt in Catalysts for the Fischer-Tropsch Synthesis

  • G. V. Pankina
  • P. A. Chernavskii
  • V. V. Lunin
Article

Abstract

A magnetic method was proposed for evaluating the average particle size of cobalt metal in supported cobalt catalysts for the Fischer-Tropsch synthesis. This method includes a set of techniques such as in situ temperature-programmed reduction and in situ temperature-programmed oxidation with simultaneous magnetization measurements and the dependence of magnetization on magnetic field intensity (the field dependence method). It was found that cobalt supported on silica gel with a bimodal pore-size distribution exhibited a special behavior in topochemical processes: the majority of cobalt particles occurred in a superparamagnetic state, while a portion occurred in a multidomain state.

Keywords

Cobalt Field Dependence Magnetic Field Intensity Cobalt Catalyst Magnetic Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK "Nauka/Interperiodica" 2005

Authors and Affiliations

  • G. V. Pankina
    • 1
  • P. A. Chernavskii
    • 1
  • V. V. Lunin
    • 1
  1. 1.Moscow State UniversityMoscowRussia

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