Catalysis Letters

, Volume 15, Issue 1–2, pp 95–103 | Cite as

Characterization of silica supported Ni and Mg basic carbonate catalyst precursors

  • G. P. Babu
  • K. D. Ghuge
  • S. V. Rammohan
  • V. Krishnan
  • A. N. Bhat
Article

Abstract

In Mg-doped Ni-silica catalyst precursors, magnesium preferentially precipitates as basic carbonate species by isomorphous substitution of nickel in basic nickel carbonate network. This has been confirmed by thermal and infrared studies. Presence of magnesium decreases the reducibility of neighbouring nickel atoms due to electronic effects and also acts as spacer/barrier thus minimizing sintering via nickel particle migration. As a consequence, the nickel dispersion in Mg/Ni-silica samples is higher than in Ni-silica samples at all SiO2/Ni ratios.

Keywords

Ni/SiO2 Mg-doping thermal studies infrared studies 

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References

  1. [1]
    Y. Nitta, T. Imanaka and S. Teranishi, J. Catal. 96 (1985) 429.Google Scholar
  2. [2]
    G.P. Babu, A.G. Basrur, A.N. Bhat and R.S. Murthy, Indian J. Chem. 29A (1990) 1094.Google Scholar
  3. [3]
    L.A.M. Hermans and J.W. Geus,Preparation of Catalysts, Vol. II, eds. B. Delmon, P. Grange, P. Jacobs and G. Poncelet (Elsevier, Amsterdam, 1979).Google Scholar
  4. [4]
    G.A. Martin, B. Imelik and M. Prettie, J. Chim. Phys. 66 (1969) 1682.Google Scholar
  5. [5]
    J.A. van Dillen, J.W. Geus, L.A.M. Hermans and J. van der Meijden, in:Proc. 6th Int. Congr. on Catalysis, London 1976, eds. G.C. Bonds, P.B. Wells and F.C. Tompkins (The Chemical Society, London) p. 677.Google Scholar
  6. [6]
    K.D. Ghuge, A.N. Bhat and G.P. Babu, Appl. Catal., to be submitted.Google Scholar
  7. [7]
    The Merck Index, An Encyclopedia of Chemicals, Drugs and Biologicals, 11th Ed. (Merck, Rahway, NJ, 1989) p. 5540.Google Scholar
  8. [8]
    R.M. Mallya and A.R. Vasudev Murthy, J. Indian Inst. Sci. 43 (1961) 44.Google Scholar
  9. [9]
    R.M. Mallya and A.R. Vasudev Murthy, J. Indian Inst. Sci. 43 (1961) 148.Google Scholar
  10. [10]
    O. Clause, L. Boneviot, M. Cha and H. Dexpert, J. Catal. 130 (1991) 21.Google Scholar
  11. [11]
    K. Tohji, Y. Udagawa, S. Tanabe and A. Ueno, J. Am. Chem. Soc. 106 (1984) 612.Google Scholar
  12. [12]
    J. Kragten,Atlas of Metal-Ligand Equilibria in Aqueous Solution (Ellis Horwood, New York) p. 437.Google Scholar
  13. [13]
    H. Tamagawa, K. Oyama, T. Yamaguchi, H. Tanaka, H. Tsuiki and A. Ueno, J. Chem. Soc. Faraday Trans. I 83 (1987) 3189.Google Scholar
  14. [14]
    C.H. Bartholomev and R.B. Pannel, J. Catal. 65 (1980) 390.Google Scholar

Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1992

Authors and Affiliations

  • G. P. Babu
    • 1
  • K. D. Ghuge
    • 1
  • S. V. Rammohan
    • 1
  • V. Krishnan
    • 1
  • A. N. Bhat
    • 1
  1. 1.Hindustan Lever Research CentreAndheri (E), BombayIndia

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