Patent · US Active

Tunable NOx adsorber

US12138619B2 · kind B2 · utility

0Cited by

9References

18Claims

0Family size

Assignee

BASF MOBILE EMISSIONS CATALYSTS, LLC · US

Inventors

Shiang Sung · New York, US
Markus Koegel · Brohl, DE
Gerd Grubert · Hannover, DE
Sven Jare Lohmeier · Hannover, DE
Alfred Punke · Walle, DE

Key dates

Filing date	Mar 19, 2020
Grant date	Nov 12, 2024
Priority date	—
Expiry date	Mar 19, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present disclosure is directed to a method for treating a gaseous exhaust stream containing nitrogen oxides (NOx) from a diesel or lean-burn gasoline engine following a cold-start of the engine The method involves contact of the gaseous exhaust stream with at least a low temperature NOx adsorber (LT-NA) component. The LT-NA component includes a rare earth metal component, a platinum group metal (PGM) component, and a dopant. The present disclosure is also directed to a method of modulating a NOx adsorption/desorption profile of an LT-NA composition, a NOx desorption temperature range of an LT-NA composition, or both.

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