Methods for making a catalytic element, the catalytic element made therefrom, and catalyzed particulate filters
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United States of America Patent
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Dec 16, 2008
Grant Date -
Dec 23, 2004
app pub date -
Jun 19, 2003
filing date -
Jun 19, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In one embodiment, a method for making a catalytic element comprises forming a first slurry of a promoter oxide precursor and a refractory inorganic oxide and calcining the first slurry to form a supported promoter. The supported promoter and a noble metal solution are combined to form a second slurry that is calcined to form a catalyst composition. The catalyst composition is applied to a substrate and the substrate is calcined to form the catalytic element. In one embodiment, the catalyzed particulate filter comprises a shell disposed around the catalytic element, wherein the shell has an inlet and an outlet, and a retention member disposed between at least a portion of the shell and the catalytic element.
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