Advertisement

Catalysis Letters

, Volume 40, Issue 3–4, pp 241–247 | Cite as

Fluorinated γ-alumina aerogels and xerogels: characterisation and catalytic behaviour

  • Tomaz Skapin
  • Erhard Kemnitz
Article

Abstract

The porosity of γ-alumina-based materials is an important parameter affecting the extent of fluorination (aerogels > commercial γ-Al2O3 > xerogels) and, consequently, also the textural, acidic and catalytic properties of the final fluorinated materials. Only the highly fiuorinated aluminas having strong Lewis acidic sites catalyse the isomerisation of CHF2CHF2 to CF3CH2F.

Keywords

γ-alumina aerogel xeroge fluorination acidity texture catalytic activity isomerisation of CHF2CHF2 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    T. Skapin, J. Mater. Chem. 5 (1995) 1215.Google Scholar
  2. [2]
    G.J. Moore and H.M. Massey, EP 0 365 296 A1 (1990).Google Scholar
  3. [3]
    L.E. Manzer and V.N.M. Rao, US 4,902,838 (1990).Google Scholar
  4. [4]
    E. Kemnitz and K.-U. Niedersen, J. Catal. 155 (1995) 283.Google Scholar
  5. [5]
    A. Hess and E. Kemnitz, J. Catal. 149 (1994) 449.Google Scholar
  6. [6]
    B. Sedej, Talanta 23 (1976) 335.Google Scholar
  7. [7]
    B. Adamczyk, Diploma Thesis, Humboldt-University, Berlin, Germany (1995).Google Scholar
  8. [8]
    G.B. McVicker, C.J. Kim and J.J. Eggert, J. Catal. 80 (1983) 315.Google Scholar
  9. [9]
    R.I. Hegde and M.A. Barteau, J. Catal. 120 (1989) 387.Google Scholar
  10. [10]
    E.C. DeCanio, J.W. Bruno, V.P. Nero and J.C. Edwards, J. Catal. 140 (1993) 84.Google Scholar
  11. [11]
    P.O. Scokart, S.A. Selim, J.P. Damon and P.G. Rouxhet, J. Colloid Interf. Sci. 70 (1979) 209.Google Scholar
  12. [12]
    K.S.W. Sing, D.H. Everett, R.A.W. Haul, L. Moscou, R.A. Pierotti, J. Rouquerol and T. Siemieniewska, Pure Appl. Chem. 57 (1985) 603.Google Scholar
  13. [13]
    J. Thomson, G. Webb and J.M. Winfield, J. Chem. Soc. Chem. Commun. (1991) 323.Google Scholar
  14. [14]
    T.H. Ballinger and J.T. Yates, J. Phys. Chem. 96 (1992) 1417.Google Scholar
  15. [15]
    Z.X. Cheng and V. Ponec, Appl. Catal. A 118 (1994) 127.Google Scholar
  16. [16]
    S.M. Maurer and E.I. Ko, Catal. Lett. 12 (1992) 231.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1996

Authors and Affiliations

  • Tomaz Skapin
    • 1
  • Erhard Kemnitz
    • 2
  1. 1.Department of Inorganic Chemistry and Technology“Jozef Stefan” InstituteLjubljanaSlovenia
  2. 2.Institute of ChemistryHumboldt UniversityBerlinGermany

Personalised recommendations