Catalyst with stable nitric oxide (no) oxidation performance
AssigneeJohnson Matthey Public Limited Company
InventorsAndrew Francis CHIFFEY, Daniel HATCHER, Francois MOREAU, Paul Richard PHILLIPS, Freyja WOODS
Life of this patent
Estimating the term…
Abstract
A method of preparing a catalyst composition for producing a stable ratio of NO2 to NO in an exhaust system of a compression ignition engine is described. The method comprises: (i) preparing a first composition comprising a platinum (Pt) compound disposed or supported on a support material; (ii) preparing a second composition by reducing the platinum (Pt) compound to platinum (Pt) with a reducing agent; and (iii) heating the second composition to at least 650° C.
Claims20
A method of preparing a catalyst composition for producing a stable ratio of NO2 to NO in an exhaust system of a compression ignition engine comprising:
- (i) preparing a first composition comprising a platinum (Pt) compound disposed or supported on a support material;
- (ii) preparing a second composition by reducing the platinum (Pt) compound to platinum (Pt) with a reducing agent;
- and
- (iii) heating the second composition to at least 650° C.
Dependencies are inferred from the claim text.