Patent · US Active

ASC/DEC with rear-concentrated exotherm generation

US10807040B2 · kind B2 · utility

4Cited by

7References

23Claims

0Family size

Assignee

Johnson Matthey Public Limited Company · GB

Inventors

Hai-Ying Chen · Conshohocken, US
Joseph Michael Fedeyko · Glen Mills, US
Jing Lu · Goleta, US

Key dates

Filing date	Mar 29, 2018
Grant date	Oct 20, 2020
Priority date	—
Expiry date	Jul 21, 2038

Classification

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

Abstract

A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone includes an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer comprising a second SCR catalyst, the top layer located over the bottom layer.

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