Soot oxidation catalyst and method of making

Details Soot oxidation catalyst and method of making Soot oxidation catalyst and method of making

2010-05-20

2011-11-08

Langel, Wayne (Department: 1736)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

C060S299000, C422S177000, C502S150000, C502S232000, C502S242000, C502S263000, C502S303000, C502S314000, C502S318000, C502S346000, C502S348000, C502S355000

Reexamination Certificate

active

08052937

ABSTRACT:
A catalyst composition for facilitating the oxidation of soot from diesel engine exhaust is provided. The catalyst composition includes a catalytic metal selected from Pt, Pd, Pt—Pd, Ag, or combinations thereof, an active metal oxide component containing Cu and La, and a support selected from alumina, silica, zirconia, or combinations thereof. The platinum group metal loading of the composition is less than about 20 g/ft3. The catalyst composition may be provided on a diesel particulate filter by impregnating the filter with an alumina, silica or zirconia sol solution modified with glycerol and/or saccharose, impregnating the filter with a stabilizing solution, and impregnating the filter with a solution containing the active metal oxide precursor(s) and the catalytic metal precursor(s). The resulting catalyst coated diesel particulate filter provides effective soot oxidation, exhibits good thermal stability, has a high BET surface area, and exhibits minimal backpressure.

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