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


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.


Cobalt Field Dependence Magnetic Field Intensity Cobalt Catalyst Magnetic Method 
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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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