Umicore Ag & Co Kg

Matthias Feger

Thomas Kreuzer

Egbert Lox

Dieter Lindner

Lothar Mussmann

Martin Votsmeier

Mamoun Muhammed

Tassilo Bog

Martin Roesch

Anke Wolf

Othon Adamopoulos

Othan Adamopoulos

The present invention relates to an exhaust gas cleaning catalyst comprising on a honeycomb carrier a catalytic coating. Said honeycomb carrier has an upstream end and a downstream end and a plurality of flow channels are running from the upstream end to the downstream end. The catalytic coating comprises catalytically active precious metal components of which at least one component exhibits a concentration profile along the honeycomb carrier starting with a low concentration at the upstream end which increases along the flow channels up to a maximum value and then decreases again to the downstream end.

Exhaust gas cleaning catalyst with an axially varying precious metal concentration and processes for making the catalyst

An oxygen storage material comprising cerium oxide and at least one second oxide of a metal Mis disclosed as well as a process for manufacturing the material and the use of this material in an exhaust gas cleaning catalyst. In a preferred embodiment the oxygen storage material comprises particles from a Ce/Mmixed oxide solid solution coated with an oxide of another metal M. Metal Me.g. can be calcium or zirconium while metal Mmost preferably is aluminum.

Oxygen storage material, process for its preparation and its application in a catalyst

Growing community of inventors

Darmstadt, Germany

Matthias Feger