Verbesserter Katalytischer Wandflussfilter

Details

Veröffentlichungs-Nr.

EP4378566

Aktenzeichen

EP23204925

Anmeldetag

20. Oktober 2023

Veröffentlichung

5. Juni 2024

Rechtsraum

EP

IPC

B01D53/94B01J29/76B01J35/57B01J37/02F01N3/035F01N3/20F01N3/28B01J35/00F01N9/00

Abstract

A catalytic wall-flow monolith filter for use in an emission treatment system is disclosed. The filter comprises porous walls, a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction. The first plurality of channels provides a first plurality of inner surfaces and is open at the first face and closed at the second face; and the second plurality of channels provides a second plurality of inner surfaces and is open at the second face and closed at the first face. The filter comprises a first selective catalytic reduction (SCR) catalyst coated on the first plurality of inner surfaces of the porous walls to form a first SCR catalyst porous layer, a second SCR catalyst within the porous walls, and a third SCR catalyst coated on the second plurality of inner surfaces of the porous walls to form a third SCR catalyst porous layer.

Anmelder

Firma

Johnson Matthey Public Limited Company

Land

🇬🇧 Großbritannien

Fachgebiete