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Cobalt/silica gel system as a chemisorbent for oxygen

  • É. G. Aleshin
  • M. A. Alimov
  • G. A. Ashavskaya
  • K. I. Slovetskaya
Physical Chemistry Adsorption. Heterogeneous Catalysis

Abstract

A study has been made of oxygen chemisorption and the phase composition of cobalt/silica gel samples containing from 1.1 to 7.7% Co by weight. Reduction in hydrogen leads to the formation of metallic cobalt with a crystal size of about 50 Å. The quantity of chemisorbed O2 at 20°C increases in proportion to the increase of [Co]. The uptake of O2 is essentially completed at 300°C with the formation of Co3O4. The high adsorption capacity for O2 is preserved unchanged in repetitive reduction-oxidation cycles. The residual content of O2 in the gas after passage through the layer of the cobalt/silica gel chemisorbent is 3·10−6% by volume.

Keywords

adsorption oxygen gas purification reduction phase composition catalyst 

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Literature cited

  1. 1.
    R. Srinivasan, R. J. De Angeles, P. J. Reucroft, et al., J. Catal.116, No. 1, 144 (1989).Google Scholar
  2. 2.
    Y. Kintaichi, K. Takeuchi, T. Matsuzaki, et al., Chem. Express,4, No. 2, 129 (1989).Google Scholar
  3. 3.
    K. Takeuchi, T. Matsuzaki, T. Hanaoka, et al., Kagaku Gijutsu Kenkyusho Hokoku,84, No. 9, 549 (1989).Google Scholar
  4. 4.
    D. G. Castner, P. R. Watson, and I. Y. Chan, J. Phys. Chem.,94, No. 2, 819 (1990).Google Scholar
  5. 5.
    S. D. Saratova, V. I. Ostroushko, I. E. Ul'yanova, et al., Zavod. Lab., No. 3, 11 (1990).Google Scholar
  6. 6.
    A. I. Kitaigorodskii, X-ray Analysis of Fine Crystalline Solids [in Russian], Gostekhteoretizdat, Moscow-Leningrad (1952), p. 127.Google Scholar
  7. 7.
    R. B. Anderson, The Fischer-Tropsch Synthesis, Chap. 4, Academic Press, New York (1989).Google Scholar

Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • É. G. Aleshin
  • M. A. Alimov
  • G. A. Ashavskaya
  • K. I. Slovetskaya

There are no affiliations available

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