NOx ADSORBER CATALYST
AssigneeJohnson Matthey Public Limited Company
InventorsAndrew Paul ARMITAGE, Desiree DURAN-MARTIN, Paul James MILLINGTON, Paul Richard PHILLIPS, Raj Rao RAJARAM, Stuart David REID, Daniel SWALLOW
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Abstract
A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst composition comprises a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.
Claims19
A NOx adsorber catalyst for treating emissions from a lean burn engine, said NOx adsorber catalyst having a first layer comprising:
- a mixture or alloy of platinum and palladium on a support containing alumina or a composite or mixed oxide containing alumina;
- and
- a NOx storage material containing ceria;
- wherein at least one of the support or the NOx storage material has a neodymium-containing component.
A NOx adsorber catalyst composition comprising a support material, one or more platinum group metals disposed on the support material, and a NOx storage material;
- wherein the support material or the NOx storage material comprises a neodymium-containing component.
Dependencies are inferred from the claim text.