Dependence of the catalytic activity of palladium-ruthenium alloys on their composition and conditions of heat treatment

  • E. V. Khrapova
  • V. M. Gryaznov
  • V. I. Kaluga
  • N. R. Roshan
  • V. I. Shimulis
  • B. Dzhuntini
  • V. V. Kornilov
Physical Chemistry
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Conclusions

  1. 1.

    The catalytic activity of binary alloys of palladium containing 4.4–9.2% Ru was investigated as a function of' the conditions of their heat treatment in an atmosphere of various gases (air, H2, Ar).

     
  2. 2.

    The results of the investigation were treated according to a program permitting calculation of the parameters of the Arrhenius equation on the assumption of normal and logarithmic-normal distributions of their values. The correctness of the hypothesis of a logarithmic-normal distribution was demonstrated.

     
  3. 3.

    Raising the temperature of treatment of the alloys in a stream of air from 350 to 750°, as well as repeated treatment in a stream of air at 750°, caused an appreciable increase in the catalytic activity, associated with an increase in the preexponential factors. An even greater increase in the activity, due to a decrease in the activation energy, is also achieved as a result of treatment of the catalyst with air, and then with H2, at 750° with rapid cooling in H2.

     

Keywords

Atmosphere Activation Energy Heat Treatment Catalytic Activity Palladium 

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Literature cited

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Copyright information

© Consultants Bureau 1974

Authors and Affiliations

  • E. V. Khrapova
    • 1
    • 2
    • 3
  • V. M. Gryaznov
    • 1
    • 2
    • 3
  • V. I. Kaluga
    • 1
    • 2
    • 3
  • N. R. Roshan
    • 1
    • 2
    • 3
  • V. I. Shimulis
    • 1
    • 2
    • 3
  • B. Dzhuntini
    • 1
    • 2
    • 3
  • V. V. Kornilov
    • 1
    • 2
    • 3
  1. 1.A. V. Topchiev Institute of Petrochemical SynthesisAcademy of Sciences of the USSRUSSR
  2. 2.P. Lumumba Peoples' Friendship UniversityUSSR
  3. 3.A. A. Baikov Institute of MetallurgyAcademy of Sciences of the USSRUSSR

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