Patent ID: 11859526
Assignee: UMICORE AG & CO. KG
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. An exhaust gas purification system for a gasoline engine, comprising in consecutive order the following devices:
a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2),
wherein a platinum-group metal concentration (PGM) of the GPF is at least 40% greater than a PGM of the TWC2, wherein the PGM is determined in g/ft3 of the volume of the device,
wherein the GPF comprises, relative to the platinum-group metal of the GPF, one of (a) to (d):
a) rhodium;
b) rhodium and palladium;
c) rhodium and platinum; or
d) rhodium, palladium and platinum;
and wherein the percentage of rhodium of the total amount of the platinum-group metal of the GPF is at least 10 wt. %.