Process for the removal from gases of nitrogen oxides NOx by selective catalytic reduction (SCR) using ammonia over zeolite catalysts not causing the formation of nitrogen protoxide - Archive ouverte HAL Accéder directement au contenu
Brevet Année : 2001

Process for the removal from gases of nitrogen oxides NOx by selective catalytic reduction (SCR) using ammonia over zeolite catalysts not causing the formation of nitrogen protoxide

Résumé

Zeolites partially exchanged with copper, in particular faujasites, in which the copper does not largely occupy the small cages (for example the sodalite cages of the faujasites), are used as non-nitrogen-protoxide-generating SCR catalysts. Particular attention is drawn to certain mixed rare-earth/copper zeolites. The selectivity of the reduction of NOx to N2 is correlated with the TPR diagram of the catalysts.

Domaines

Catalyse
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Dates et versions

hal-00180411 , version 1 (19-10-2007)

Identifiants

  • HAL Id : hal-00180411 , version 1

Citer

Bernard Coq, Gerard Delahay, François Fajula, Bernard Neveu, Jean-Bernard Peudpiece, et al.. Process for the removal from gases of nitrogen oxides NOx by selective catalytic reduction (SCR) using ammonia over zeolite catalysts not causing the formation of nitrogen protoxide. United States, Patent n° : US6221324. 2001. ⟨hal-00180411⟩
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