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Catalysis Letters

, Volume 12, Issue 1–3, pp 147–155 | Cite as

Preparation of bifunctional catalysts by solid-state ion exchange in zeolites

  • H. G. Karge
  • Y. Zhang
  • H. K. Beyer
Article

Abstract

Bifunctional catalysts containing an acidic as well as a hydrogenation/dehydrogenation function were prepared by solid-state ion exchange. Preparation and properties of Pd-loaded H-ZSM-5 are described in detail. The catalytic behavior of the reduced catalysts was investigated using hydrogenation and hydroisomerisation of ethylbenzene as a test reaction. The catalytic performance of the catalysts could be significantly improved by concomitant incorporation of Ca2+. This was advantageously achieved in a two-step procedure, where first a solid-state ion exchange with CaCl2 and subsequently a second solid-state ion exchange with PdCl2 was carried out. A Ca, H-ZSM-5 with 1.5 wt-% Pd obtained via this two-step procedure and subsequent reduction in H2 exhibited high activity, long life-time and good selectivity with respect to hydrogenation and hydroisomerisation of ethylbenzene to ethylcyclohexane and dimethylcyclohexanes, respectively. Electron micrographs of the reduced catalyst showed finely dispersed palladium with maximum size of about 2.0 nm.

Keywords

Catalysis zeolites palladium ion exchange solid-state hydrogenation hydroisomerisation ethylbenzene 

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References

  1. [1]
    J.A. Rabo, V. Schomaker and P.E. Pickert,Proc. 3rd Int. Congr. Catalysis, Amsterdam, The Netherlands, July, 20–25, 1964, eds. W.M.H. Sachtler, G.C.A. Schuit and P. Zwietering (North-Holland Publishing Comp., Amsterdam) Vol. 2 (1965) 1264–1275.Google Scholar
  2. [2]
    P.A. Jacobs, in:Metal Clusters in Catalysis, eds. B.C. Gates, L. Guczi and H. Knözinger (Elsevier, Amsterdam, 1986); Studies in Surface Sci. and Catalysis 29 (1986) 357–414.Google Scholar
  3. [3]
    S.T. Hohmeyer and W.M.H. Sachtler, in: Zeolites: Facts, Figures, Future, Proc. 8th Int. Zeolite Conference, Amsterdam, The Netherlands, July 10–14, 1989, eds. P.A. Jacobs and R. van Santen (Elsevier, Amsterdam); Studies in Surface Sci. and Catalysis 49 (B) (1989) 975–984.Google Scholar
  4. [4]
    R.M. Dessau, J. Catal. 77 (1982) 304–306.Google Scholar
  5. [5]
    G.H. van den Berg and H.Th. Rijnten, in:Preparation of Catalysts II-Scientific Base for Preparation of Heterogeneous Catalysts;Proc. 2nd Int. Symp., Louvain-la-Neuve, Belgium, Sept, 4–7, 1978, eds. B. Delmon, P. Grange, P. Jacobs and G. Poncelet (Elsevier, Amsterdam 1979); Studies in Surf. Sci. and Catalysis 3 (1979) 265–274.Google Scholar
  6. [6]
    K.R. Poeppelmeier, T.D. Trowbridge and Jar-Lin Kao, U.S. Patent, Feb. 4, 1986; 4, 568, 656.Google Scholar
  7. [7]
    Kh.M. Minachev and Ya.I. Isakov, in:Zeolite Chemistry and Catalysis, ed. J.A. Rabo; ACS Monograph 171 (Am. Chem. Soc., Washington, D.C., 1971) Ch. 10, pp. 552–661.Google Scholar
  8. [8]
    P. Gallezot, in:Catalysis by Zeolites, Proc. Int. Symp., Ecully (Lyon), France, Sept. 9–11, 1980, eds. B. Imelik et al. (Elsevier, Amsterdam, 1980); Studies in Surface Sci. and Catalysis 5 (1980) 227–234.Google Scholar
  9. [9]
    J.A. Rabo, M.L. Poutsma and G.W. Skeels,Proc. 5th Int. Congress on Catalysis, Miami Beach, Flo. USA, August 20–26, 1972, ed. J.W. Hightower (North-Holland Publishing Comp., Amsterdam, 1973) 1353–1361.Google Scholar
  10. [10]
    A. Clearfield, C.H. Saldariagga and R.C. Buckley,Proc. 3rd Int. Conf. on Molecular Sieves; Recent Progress Reports, Zurich, Switzerland, Sept. 3–7, 1973, ed. J. Uytterhoeven (University of Leuven Press, 1973, Leuven, Belgium) Paper No. 130, pp. 241–245.Google Scholar
  11. [11]
    A.V. Kucherov and A.A. Slinkin, Zeolites 6 (1986) 175–180.Google Scholar
  12. [12]
    H.K. Beyer, H.G. Karge and G. Borbély, Zeolites 8 (1988) 79–82.Google Scholar
  13. [13]
    H.G. Karge, H.K. Beyer and G. Borbély, Catal. Today 3 (1988) 41–52.Google Scholar
  14. [14]
    H.G. Karge, G. Borbély, H.K. Beyer and G. Onyestyák,Proc. 9th Int. Congress on Catalysis, Calgary, Canada, June 26–July 1, 1988, eds. M.J. Philips and M. Ternan (Chemical Institute of Canada, Ottawa, 1988) pp. 396–403.Google Scholar
  15. [15]
    H.G. Karge, V. Mavrodinová, Z. Zheng and H.K. Beyer, Appl. Catal. 75 (1991) 343–358.Google Scholar
  16. [16]
    B. Wichterlová, S. Beran, L. Kubelková, J. Nováková and A. Smiešková, in:Zeolites as Catalysts, Sorbents and Detergent Builders — Applications and Innovations, Proc. Int. Symp., Würzburg, F.R.G., Sept. 4–8, 1988, eds. H.G. Karge and J. Weitkamp; Studies Surface Sci. Catalysis 46 (1989) 347–353.Google Scholar
  17. [17]
    DE 3601378, Patentklasse C2 (23.07.1987); information by courtesy of Degussa, Wolfgang, FRG.Google Scholar
  18. [18]
    H.G. Karge, M. Laniecki, M. Ziolek, G. Onyestyák, A. Kiss, P. Kleinschmit and M. Siray, in:Zeolites: Facts, Figures, Future, Proc. 8th Int. Conf. on Zeolites, Amsterdam, The Netherlands, July 10–14, 1989, eds. P.A. Jacobs and R. van Santen (Elsevier, Amsterdam, 1989); Studies in Surface Sci. Catalysis 49 (1989) 1327–1337.Google Scholar
  19. [19]
    H. Karge, Z. phys. Chem. Neue Folge 76 (1971) 133–153.Google Scholar
  20. [20]
    H.G. Karge, Z. phys. Chem. Neue Folge 122 (1980) 103–116.Google Scholar
  21. [21]
    H.G. Karge, Z. Sarbak, K. Hatada, J. Weitkamp and P.A. Jacobs, J. Catal. 82 (1983) 236–239.Google Scholar
  22. [22]
    H.G. Karge, J. Ladebeck, Z. Sarbak and K. Hatada, Zeolites 2 (1982) 94–102.Google Scholar
  23. [23]
    H.G. Karge and V. Dondur, J. Phys. Chem. 94 (1990) 765–772.Google Scholar
  24. [24]
    L. Jozefowicz and H.G. Karge, in preparation.Google Scholar
  25. [25]
    H.G. Karge, in:Zeolite Microporous Solids: Synthesis, Structure and Reactivity (NATO ASI Series) in press.Google Scholar
  26. [26]
    N.T. Jaeger, G. Schulz-Ekloff and A. Svensson, in:New Developments in Zeolite Science Technology, Proc. 7th Int. Zeolite Conf., Tokyo, Japan, August 17–22, 1986, eds. Y. Murakami, A. Iijima and J.W. Ward (Kodansha, Tokyo and Elsevier, Amsterdam, 1986) pp. 923–928.Google Scholar

Copyright information

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

Authors and Affiliations

  • H. G. Karge
    • 1
  • Y. Zhang
    • 1
  • H. K. Beyer
    • 1
  1. 1.Fritz Haber Institute of the Max Planck SocietyBerlin 33Germany

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