Journal of Materials Science

, Volume 30, Issue 3, pp 737–743 | Cite as

Thermal decomposition of the Pb, Al-hydrotalcite material

  • M. L. Valcheva-Traykova
  • N. Davidova
  • A. H. Weiss


The transformation of methane into C2 hydrocarbons over thermally degraded Mg, Pb, Al-hydrotalcite material proceeds with the active participation of β-PbO. The conditions of pre-treatment leading β-PbO formation in the catalyst have been examined on the Pb, Al-hydrotalcite material as a model system. By use of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy and diffusereflectance spectroscopy techniques, it was found that the temperature interval 600–750 °C is optimal for β-PbO crystallization. On the basis of the present and previous results, the formation of all components of the catalytically active thermally degraded Mg, Pb, Al-hydrotalcite material, has been explained. During calcination of the Mg, Pb, Al-hydrotalcite material, the lead-containing components form β-PbO and γ-Al2O3 and the magnesium-containing components transform to a finely dispersed MgO-Al2O3 matrix.


Polymer Spectroscopy Microscopy Electron Microscopy Scanning Electron Microscopy 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • M. L. Valcheva-Traykova
    • 1
  • N. Davidova
    • 1
  • A. H. Weiss
    • 2
  1. 1.Institute of Kinetics and CatalysisBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Department of Chemical EngineeringWorcester Polytechnic InstituteWorcesterUSA

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