Patent · US Active

LNT and SCR catalysts for combined LNT-SCR applications

US9597664B2 · kind B2 · utility

4Cited by

5References

16Claims

0Family size

Assignee

Ford Global Technologies, LLC · US

Inventors

Albert Chigapov · Aachen, DE
Robert Ukropec · Aachen, DE
Brendan Patrick Carberry · Aachen, DE

Key dates

Filing date	Jan 26, 2012
Grant date	Mar 21, 2017
Priority date	—
Expiry date	Oct 30, 2035

Classification

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

Abstract

The current invention refers to the LNT and the SCR catalysts designed for combined LNT-SCR applications. LNT catalysts are based on proton-conducting oxides of fluorite structure, namely Ca (Sr)—La—Ce (Zr, Pr) mixed oxides in which up to 40 mol-% of lanthanum is replaced by calcium and/or strontium, and up to 66 mol-% of cerium is replaced by zirconium and/or praseodymium, further combined with Pt—Pd or Pt—Pd—Rh precious metal components. SCR catalysts are Cu/zeolite modified by citrate treatment or Cu—Ce, Mn—Ce or Co—Ce/modified zeolite.

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