Abgasreinigungskatalysator

Details

Veröffentlichungs-Nr.

EP4772274

Anmeldetag

21. August 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

Abstract

An exhaust gas purification catalyst includes an upstream catalyst provided on an upstream side in an exhaust gas flow direction; and a downstream catalyst provided on a downstream side in the exhaust gas flow direction, in which the upstream catalyst includes a substrate A and a layer a1 provided on the substrate A, the downstream catalyst includes a substrate B and a layer b1 provided on the substrate B, the layer a1 contains Rh and a Ce-Zr-Al-based composite oxide, the layer b1 contains Rh and a Ce-Zr-based composite oxide, a content of Al in terms of Al₂O₃ in the Ce-Zr-Al-based composite oxide contained in the layer a1 is 30 mass% or more with respect to a mass of the Ce-Zr-Al-based composite oxide, a content of the Ce-Zr-Al-based composite oxide contained in the layer a1 is 50 mass% or more with respect to a mass of the layer a1, and the layer b1 does not contain Al, or when Al is contained, a content of Al in terms of Al₂O₃ contained in the layer b1 is 30 mass% or less with respect to a mass of the layer b1.

Anmelder

Firma

Mitsui Kinzoku Company, Limited

Land

🇯🇵 Japan