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Reaction Kinetics and Catalysis Letters

, Volume 49, Issue 1, pp 173–181 | Cite as

Effect of precipitation medium and thermal treatment on structure and textural properties of chromium orthophosphates

  • F. M. Bautista
  • J. M. Campelo
  • A. Garcia
  • D. Luna
  • J. M. Marinas
  • M. R. Urbano
Article

Abstract

The effect of the precipitation agent on the structure and textural properties of CrPO4 (Cr/P=1) catalysts has been studied. Catalysts obtained in propylene oxide-aqueous ammonia exhibited higher thermal stability and, hence, greater surface areas and pore volumes than catalysts obtained in propylene oxide or aqueous ammonia exclusively. The former also showed a small surface area decrease on increasing calcination temperature up to 1073 K. Nevertheless, calcination at 1273 K develops in all cases crystalline CrPO4, showing the β-structure. Moreover, CrPO4 catalysts thermally treated below 1273 K only exhibited hydrogen bonded hydroxy groups\((\nu _{{\rm O} - {\rm H}} \simeq 3450 cm^{ - 1} )\).

Keywords

Propylene Thermal Stability Calcination Pore Volume Calcination Temperature 
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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References

  1. 1.
    J.M. Campelo, A. Garica, D. Luna, J.M. Marinas: Can. J. Chem.,61, 2567 (1983).Google Scholar
  2. 2.
    J.M. Campelo, J.M. Marinas, S. Mendioroz, J. Pajares: J. Catal.,101, 484 (1986).Google Scholar
  3. 3.
    J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas: J. Catal.,111, 106 (1988).Google Scholar
  4. 4.
    J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas, M.I. Martinez: Mater. Chem. phys.,21, 409 (1989).Google Scholar
  5. 5.
    F.M. Bautista, J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas, A.A. Romero: Appl. Catal., in press.Google Scholar
  6. 6.
    P.M. Deya, A. Costa, J.V. Sinisterra, J.M. Marinas: Can. J. Chem.,60, 35 (1982).Google Scholar
  7. 7.
    J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas, M.S. Moreno: J. Colloid Interface Sci.,118, 98 (1987).Google Scholar
  8. 8.
    A. Blanco, J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas: Appl. Catal.,53, 135 (1989).Google Scholar
  9. 9.
    J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas, M. Martinez-Cunquero: Proc. 11th Iberoamerican Symp. Catal., Guanajuato, Mexico 1988, p. 799.Google Scholar
  10. 10.
    M. Giorgini, A. Lucchesi, F. Morelli, G. Stoppato, R. Tartarelli: Ann. Chim. (Rome)58, 1470 (1968).Google Scholar
  11. 11.
    B. Gallace, J.B. Moffat: J. Catal.,76, 182 (1982).Google Scholar
  12. 12.
    M.M. Johnson, G.P. Nowack: US Pat. 4543436 (1985).Google Scholar
  13. 13.
    F.M. Bautista, J.M. Campelo, A. Garcia, D. Luna, J.M. Marinas, M.R. Urbano: React. Kinet. Catal. Lett.,49,Google Scholar
  14. 14.
    E.P. Barrett, L.S. Joyner, P.P. Halenda: J. Am. Chem. Soc.,73, 373 (1951).Google Scholar
  15. 15.
    E.J. Baran, M.C. Grasselli: An. Asoc. Quim. Argent.,73, 7 (1985).Google Scholar
  16. 16.
    S. Brunauer, L.S. Deming, W.S. Deming, E. Teller: J. Am. Chem. Soc.,62, 1723 (1940).Google Scholar
  17. 17.
    K.S.W. Sing, D.H. Everett, R.A.W. Haul, L. Moscou, R.A. Pierotti, J. Rouquerol, T. Siemieniewska: Pure Appl. Chem.,57, 603 (1985).Google Scholar
  18. 18.
    W.D. Harkins, G. Jura: J. Chem. Phys.,11, 431 (1943).Google Scholar

Copyright information

© Akadémiai Kiadó 1993

Authors and Affiliations

  • F. M. Bautista
    • 1
  • J. M. Campelo
    • 1
  • A. Garcia
    • 1
  • D. Luna
    • 1
  • J. M. Marinas
    • 1
  • M. R. Urbano
    • 1
  1. 1.Department of Organic Chemistry, Faculty of SciencesCordoba UniversityCordobaEspaña

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