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

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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.

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Authors and Affiliations

  1. Dipartimento di Chimica, Materiali e ingegneria chimica “G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci, 32, 20133, Milano, Italy

    F. Arosio & G. Groppi

  2. Dipartimento di Scienze e Tecnologie Chimiche, Università degli Studi di Udine, Via Cotonificio, 108, 33100, Udine, Italy

    S. Colussi & A. Trovarelli

Authors
  1. F. Arosio
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  2. S. Colussi
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  3. G. Groppi
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  4. A. Trovarelli
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Correspondence to G. Groppi.

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Arosio, F., Colussi, S., Groppi, G. et al. Regeneration of S-poisoned Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts for the combustion of methane. Top Catal 42, 405–408 (2007). https://doi.org/10.1007/s11244-007-0214-y

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  • DOI: https://doi.org/10.1007/s11244-007-0214-y

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