Catalysis Letters

, Volume 1, Issue 11, pp 377–383 | Cite as

Ammoxidation of toluene over molybdenum oxides

  • Arne Andersson
  • Staffan Hansen


The ammoxidation of toluene was studied both in presence and absence of gaseous oxygen over MoO3 and in situ prepared Mo4O11 (orth.) and MoO2. Irrespective of the partial pressure of oxygen, total reaction rates decrease in the following order: MoO3 > Mo4O11 > MoO2. The corresponding sequence for the selectivity towards formation of benzonitrile was found to depend on the partial pressure of oxygen. In two phase samples, no synergistic effects were observed for the formations of nitrile and carbon oxides. A comparison of rates for selective and nonselective products obtained in presence of gaseous oxygen with those obtained in its absence yield information as to whether the various products are formed at identical or different crystal faces. In the case of MoO3, nitrile and carbon oxides were found to be competitively formed at the same faces, while over MoO2 they are formed at different faces. Both options seem to prevail on Mo4O11.


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  1. [1]
    J. Haber,The Role of Molybdenum in Catalysis (Climax Molybdenum Co Ltd, London, 1981).Google Scholar
  2. [2]
    R.K. Grasselli, J.F. Brazdil and J.D. Burrington, in:Proc 8th Intern. Congr. on Catal., Vol. V (Verlag Chemie, Weinheim, 1984) pp. 369–380.Google Scholar
  3. [3]
    R.K. Grasselli and J.D. Burrington, in:Advances in Catalysis, eds. D.D. Eley, H. Pines and P.B. Weisz, Vol. 30 (Academic Press, New York, 1981) pp. 133–163.Google Scholar
  4. [4]
    B. Grzybowska, J. Haber and J. Janas, J. Catal. 49 (1977) 150.Google Scholar
  5. [5]
    J.C. Volta, M. Forissier, F. Theobald and T.P. Pham, Faraday Discuss. Chem. Soc. 72 (1981) 225.Google Scholar
  6. [6]
    J.C. Volta and J.M. Tatibouet, J. Catal. 93 (1985) 467.Google Scholar
  7. [7]
    K. Brückman, R. Grabowski, J. Haber, A. Mazurkiewicz, J. Słoczyński and T. Wiltowski, J. Catal. 104 (1987) 71.Google Scholar
  8. [8]
    J. Haber and E. Serwicka, Polyhedron 5 (1986) 107.Google Scholar
  9. [9]
    A. Guerrero-Ruiz, J. Massardier, D. Duprez, M. Abon and J.C. Volta, in:Proc. 9th Intern. Congr. on Catal, eds. M.J. Phillips and M. Ternan, Vol. 4 (The Chemical Institute of Canada, Ottawa, 1988) pp. 1601–1608.Google Scholar
  10. [10]
    J.C. Volta, J.M. Tatibouet, C. Phichitkul and J.E. Germain, in:Proc. 8th Intern. Congr. on Catal., Vol. IV (Verlag Chemie, Weinheim, 1984) pp. 451–461.Google Scholar
  11. [11]
    A. Andersson and S. Hansen, J. Catal., accepted.Google Scholar
  12. [12]
    J. Haber, in:Solid State Chemistry in Catalysis, eds. R.K. Grasselli and J.F. Brazdil (American Chemical Society, Washington D.C., 1985) Ch.1.Google Scholar
  13. [13]
    A. Andersson and S.T. Lundin, J. Catal. 58 (1979) 383.Google Scholar
  14. [14]
    A. Andersson and J.-O. Bovin, Naturwisssenschaften 72 (1985) 209.Google Scholar
  15. [15]
    A. Andersson, J.-O Bovin and P. Walter, J. Catal. 98 (1986) 204.Google Scholar
  16. [16]
    J. Haber, in:Surface Properties and Catalysis by Non-Metals, eds. J.P. Bonnelle, B. Delmon and E. Derouane, NATO ASI Series, Ser. C No. 105 (Reidel, Dordrecht, 1983) pp. 1–45.Google Scholar
  17. [17]
    L.T. Weng, B. Zhou, B. Yasse, B. Doumain, P. Ruiz and B. Delmon, in:Proc. 9th Intern. Congr. on Catal., eds. M.J. Phillips and M. Ternan, Vol. 4 (The Chemical Institute of Canada, Ottawa, 1988) pp. 1609–1616.Google Scholar
  18. [18]
    Powder Diffraction File (JCPDS International Centre for Diffraction Data, Swarthmore, 1985).Google Scholar
  19. [19]
    S. Hansen and A. Andersson, J. Solid State Chem. 75 (1988) in press.Google Scholar
  20. [20]
    S. Hansen and A. Andersson, in:Proc. 9th European Congress on Electron Microscopy, York, 4–9 Sept. 1988, in press.Google Scholar
  21. [21]
    A. Andersson, J. Catal. 100 (1986) 414.Google Scholar
  22. [22]
    J.C. Otamiri and A. Andersson, Catal. Today 3 (1988) 211.Google Scholar

Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1988

Authors and Affiliations

  • Arne Andersson
    • 1
  • Staffan Hansen
    • 2
  1. 1.Department of Chemical Technology, Chemical CenterLund Institute of TechnologyLundSweden
  2. 2.Department of Inorganic Chemistry 2, Chemical CenterLund Institute of TechnologyLundSweden

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