Advertisement

Hyperfine Interactions

, Volume 69, Issue 1–4, pp 767–770 | Cite as

197Au Mössbauer study of the deactivation and reactivation of a carbon-supported AuCl 4 hydrochlorination catalyst

  • J. Friedl
  • F. E. Wagner
  • B. Nkosi
  • M. Towert
  • N. J. Coville
  • M. D. Adams
  • G. J. Hutchings
Catalysys, Corrosion and Surface Phenomena

Abstract

Acetylene hydrochlorination catalysts consisting of activated carbon impregnated with a solution of HAuCl4·xH2O in aqua regia have been studied by197Au Mössbauer spectroscopy. The relative amounts of AuCl 4 , of Au(0), and of an Au(J) species formed under certain process conditions were determined quantitatively. Deactivation of the catalyst at low and high temperatures was shown to be due to different mechanisms, and the reactivation of the catalyst by Cl2 gas was studied.

Keywords

Spectroscopy Thin Film Activate Carbon Process Condition Acetylene 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    G. J. Hutchings, J. Catalysis 96 (1985) 292.CrossRefGoogle Scholar
  2. [2]
    B. Nkosi, N. J. Coville and G. J. Hutchings, J. Chem. Soc. Chem. Commun. (1988) 71; Appl. Catalysis 43 (1988) 33.Google Scholar
  3. [3]
    B. Nkosi, N. J. Coville, G. J. Hutchings, M. D. Adams, J. Friedl and F. E. Wagner, J. Catalysis 128 (1991) 366.CrossRefGoogle Scholar
  4. [4]
    B. Nkosi, M. D. Adams, N. J. Coville and G. J. Hutchings, J. Catalysis 128 (1991) 378.CrossRefGoogle Scholar
  5. [5]
    K. Kongolo, A. Bahr, J. Friedl and F. E. Wagner, Metallurgical Transactions B21 (1990) 239.Google Scholar
  6. [6]
    H. D. Bartunik, W. Potzel, R. L. Mössbauer and G. Kaindl, Z. Physik 240 (1970) 1.CrossRefGoogle Scholar
  7. [7]
    H. D. Bartunik and G. Kaindl, in:Mössbauer Isomer Shifts, eds. G. K. Shenoy and F. E. Wagner (North Holland, Amsterdam, 1978) p. 514.Google Scholar
  8. [8]
    R. V. Parish, Gold Bulletin 15 (1982) 51.Google Scholar
  9. [9]
    R. V. Parish, Hyp. Int. 40 (1988) 159.CrossRefGoogle Scholar

Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1991

Authors and Affiliations

  • J. Friedl
    • 1
  • F. E. Wagner
    • 1
  • B. Nkosi
    • 2
  • M. Towert
    • 2
  • N. J. Coville
    • 2
  • M. D. Adams
    • 3
  • G. J. Hutchings
    • 4
  1. 1.Physics DepartmentTechnical University of MunichGarchingGermany
  2. 2.Department of ChemistryUniversity of the WitwatersrandJohannesburgSouth Africa
  3. 3.Council for Mineral TechnologyRandburgSouth Africa
  4. 4.Department of ChemistryUniversity of LiverpoolLiverpoolUK

Personalised recommendations