Method for manufacturing gasoline particulate filter
AssigneeJohnson Matthey Public Limited Company
InventorsBrenda Benet Rajkumar, Ketan Chavda, Lucy Clowes, Olivia Dunseath, Mark Walton
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Abstract
A method for the manufacture of a gasoline particulate filter (GPF) for the treatment of an exhaust gas is disclosed. The method comprises (i) forming a washcoat slurry; (ii) coating a wall-flow filter substrate with the washcoat slurry to form a washcoated substrate; and (iii) calcining the washcoated substrate to form a gasoline particulate filter. The washcoat slurry comprises (a) a platinum group metal selected from the group consisting of Pt, Pd, Rh and mixtures thereof; (b) an oxygen storage capacity (OSC) material; and (c) a C2-C6 aliphatic amino acid.
Claims20
A method for the manufacture of a gasoline particulate filter (GPF) for the treatment of an exhaust gas, the method comprising:
- (i) forming a washcoat slurry;
- (ii) coating a wall-flow filter substrate with the washcoat slurry to form a washcoated substrate;
- and
- (iii) calcining the washcoated substrate to form a gasoline particulate filter;
- wherein the washcoat slurry comprises (a) a platinum group metal selected from the group consisting of Pt, Pd, Rh and mixtures thereof;
- (b) an oxygen storage capacity (OSC) material;
- and (c) a C2-C6 aliphatic amino acid.
Dependencies are inferred from the claim text.