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 O-2, partial regeneration took place for both systems only above 750 degrees 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 degrees C. Experiments evidenced an effective role of certain preventing PdO from sulphation and in promoting regeneration via sulphates decomposition under reducing conditions.

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

COLUSSI, Sara;TROVARELLI, Alessandro
2007-01-01

Abstract

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 O-2, partial regeneration took place for both systems only above 750 degrees 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 degrees C. Experiments evidenced an effective role of certain preventing PdO from sulphation and in promoting regeneration via sulphates decomposition under reducing conditions.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/858206
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 9
social impact