Patent · US Active

Filter comprising combined soot oxidation and NH3-SCR catalyst

US9283519B2 · kind B2 · utility

1Cited by

23References

18Claims

0Family size

Assignee

Johnson Matthey Public Limited Company · GB

Inventors

Jillian Elaine Collier · Reading, GB
Ralf Dotzel · Burgkunstadt, DE
Sylvie Cécile Laroze · Brightwell-cum-Sotwell, GB
Rainer Leppelt · Lichtenfels, DE
Paul James Millington · Reading, GB
Jörg Werner Münch · Lichtenfels, DE
Raj Rao Rajaram · Slough, GB
Hubert Schedel

Key dates

Filing date	Feb 1, 2011
Grant date	Mar 15, 2016
Priority date	—
Expiry date	May 1, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49345
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A wall-flow filter for filtering particulate matter from a flowing exhaust gas comprises a catalyst for catalyzing both the conversion of solid carbon in the particulate matter by oxygen and the selective reduction of oxides of nitrogen in the exhaust gas with a nitrogenous reductant, which catalyst comprising optionally stabilized ceria and at least one metal selected from (i) tungsten and (ii) both tungsten and iron.

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