Topics in Catalysis

, Volume 42, Issue 1–4, pp 405–408 | Cite as

Regeneration of S-poisoned Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts for the combustion of methane

Article

This work investigates the regeneration of S-poisoned Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts under different CH4 containing atmospheres. Under lean combustion conditions in the presence of excess O2, partial regeneration took place for both systems only above 750 °C after decomposition of stable sulphate species adsorbed on the support. Under alternate lean combustion/CH4-reducing pulse regeneration is markedly anticipated down to 550–600 °C. Experiments evidenced an effective role of ceria in preventing PdO from sulphation and in promoting regeneration via sulphates decomposition under reducing conditions.

Keywords

Pd-catalysts CH4 combustion sulphur poisoning catalyst regeneration 
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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • F. Arosio
    • 1
  • S. Colussi
    • 2
  • G. Groppi
    • 1
  • A. Trovarelli
    • 2
  1. 1.Dipartimento di Chimica, Materiali e ingegneria chimica “G. Natta”Politecnico di MilanoMilanoItaly
  2. 2.Dipartimento di Scienze e Tecnologie ChimicheUniversità degli Studi di UdineUdineItaly

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