Diesel particulate filters having ultra-thin catalyzed...

B - Operations – Transporting – 01 – D

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B01D 53/94 (2006.01) F01N 3/08 (2006.01)

Patent

CA 2629129

The present invention is directed to an exhaust gas treatment system and method for removing particulate matter and nitrogen oxides from diesel engine exhaust streams. More specifically, the present invention relates to an emission treatment system that effectively provides simultaneous treatment of the particulate matter, as well as the NOx and other gaseous components of diesel engine exhaust. The emission treatment system uses an integrated soot filter coated with a catalyst washcoat composition comprising sub-micron particles, thereby providing an ultra- thin sub-micron washcoat layer showing improved catalyst performance without causing excessive backpressure.

Système et procédé pour le traitement de gaz d'échappement permettant d'éliminer les matières particulaires et les oxydes d'azote dans les flux de gaz d'échappement de moteur diesel. Plus précisément, système de traitement d'émissions assurant simultanément avec efficacité le traitement des matières particulaires et du Nox ainsi que d'autres composantes gazeuses dans les gaz d'échappement de moteur diesel. Le système en question est équipé d'un filtre à suie intégré revêtu d'une composition de revêtement réactif catalytique qui renferme des particules de taille inférieure au micron, permettant d'établir une couche de revêtement réactif de taille inférieure au micron ultra-mince qui offre une performance catalytique améliorée sans engendrer de contre-pression excessive.

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