Catalysis Letters

, Volume 25, Issue 3–4, pp 351–359 | Cite as

Maximum and time stable aromatic yield in the reforming of alkylcyclopentanes over Pt/β zeolites

  • Panagiotis G. Smirniotis
  • Eli Ruckenstein


The reforming of alkylcyclopentanes is performed at 100 psig over various dealuminated zeoliteβ catalysts supporting various amounts of Pt. As a result of the proper balance between the Brønsted acidity and the metal loading, a maximum aromatic yield was found for a dealuminated catalyst with a SiO2/Al2O3 molar ratio of 130 and 0.5 wt% Pt. The activity of this catalyst remained unchanged with time on stream, and the amount of coke deposited on the catalyst was very low. The aromatic selectivity increased slightly in the initial few hours and then reached a constant value. It appears that the aromatic selectivity is enhanced by the deposition of a small amount of coke. The balancing of the acidic and metallic functions of Pt/β zeolite via dealumination and Pt loading provides a useful reforming catalyst.


reforming β zeolite dealumination balancing of the metallic and acidic functions alkylcyclopentanes coke 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    G.A. Mills, H. Heinemann, T.H. Milliken and A.G. Oblad, Ind. Eng. Chem. 45 (1953) 134.Google Scholar
  2. [2]
    P.B. Weisz and E.W. Swegler, Science 126 (1957) 31.Google Scholar
  3. [3]
    C. Dossi, C.M. Tsang, W.M.H. Sachtler, R. Psaro and R. Ugo, Energy & Fuels 3 (1989) 468.Google Scholar
  4. [4]
    T.R. Hughes, W.C. Buss, P.W. Tamm and R.L. Jacobson, in:New Developments in Zeolite Science and Technology, Studies in Surface Science and Catalysis, Vol. 28, eds. Y. Murakami, A. Iijima and J.W. Ward (Kodansha/Elsevier, Tokyo/Amsterdam, 1986) p. 725.Google Scholar
  5. [5]
    H. Schulz, J. Weitkamp and H. Eberth, in:Proc. 5th Congr. on Catalysis, Vol. 2 (North-Holland, Amsterdam, 1973) p. 1229.Google Scholar
  6. [6]
    P.G. Smirniotis and E. Ruckenstein, J. Catal. 140 (1993) 526.Google Scholar
  7. [7]
    P.G. Smirniotis and E. Ruckenstein, Chem. Eng. Sci. 48 (1993) 3263.Google Scholar
  8. [8]
    P.B. Weisz, Adv. Catal. 13 (1962) 137.Google Scholar
  9. [9]
    K. Tanabe, M. Misono, Y. Ono and Hattori, in:New Solid Acids and Bases: Their Catalytic Properties, Vol. 51, eds. B. Delmon and J.T. Yates (Elsevier, Amsterdam, 1984).Google Scholar
  10. [10]
    A.I.M. Keulemans and H.H. Voge, J. Phys. Chem. 63 (1959) 476.Google Scholar
  11. [11]
    J. Weitkamp, in:Proc. Int. Symp. on Zeolite Catalysis, Siofok 1985, p. 271.Google Scholar
  12. [12]
    J. Weitkamp, P.A. Jacobs and S. Ernst, in:Structure and Reactivity of Modified Zeolites, Studies in Surface Science and Catalysis, Vol. 18, eds. P.A. Jacobs, N.I. Jaeger, P. Jiru, V.B. Kazansky and G. Schulz-Ekloff (Elsevier, Amsterdam, 1984) p. 279.Google Scholar
  13. [13]
    E. Ruckenstein and P.G. Smirniotis, Catal. Lett. 24 (1994) 123.Google Scholar
  14. [14]
    F.G. Gault, Adv. Catal. 30 (1981) 1.Google Scholar
  15. [15]
    J.M. Parera, R.J. Verderone and C.A. Querini, in:Catalyst Deactivation, Studies in Surface Science and Catalysis, Vol. 34, eds. B. Delmon and G.F. Froment (Elsevier, Amsterdam, 1987) p. 135.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Panagiotis G. Smirniotis
    • 1
  • Eli Ruckenstein
    • 1
  1. 1.Department of Chemical EngineeringState University of New York at BuffaloBuffaloUSA

Personalised recommendations