Patent · US Active

Use of a palladium/platinum/zeolite-based catalyst as passive nitrogen oxide adsorber for purifying exhaust gas

US11161100B2 · kind B2 · utility

1Cited by

29References

23Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Christoph Hengst · Rockenberg, DE
Michael Lennartz · Frankfurt, DE
Frank-Walter Schuetze · Haibach, DE

Key dates

Filing date	Aug 24, 2018
Grant date	Nov 2, 2021
Priority date	—
Expiry date	Aug 24, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2229/42
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to the use of a catalyst as a passive nitrogen oxide adsorber, which has a carrier substrate, a zeolite, palladium, and platinum, wherein the palladium is provided in a quantity of 0.01 to 10 wt. %, based on the sum of the weights of zeolite, platinum, and palladium and calculated as a palladium metal, and platinum in a quantity of 0.1 to 10 wt. %, based on the weight of the palladium and calculated as a platinum metal. The invention also relates to the use of said catalyst in connection with a SCR catalyst in an exhaust gas system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.