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US 2003/0198579 A1Published application
Exhaust emission treatment device with a sulfur-free catalyst composition
OwnerWilliam J. LaBargeinventor
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Abstract
A catalyst composition is disclosed comprising a support, a substantially sulfur-free stabilizer and a catalytic metal. Also disclosed is the catalytic converter comprising this new catalyst. Methods of making the catalyst composition and the catalytic converter are also described. The lack of added sulfur combined with basic pH application provide a catalyst with excellent stability for high temperature applications such as close coupled catalysts.
Claims14
An exhaust emission treatment device, comprising:
- a shell;
- a substrate comprising a catalyst composition, wherein the catalyst composition comprises a catalyst support, a catalytic metal, and a stabilizer comprising less than or equal to 0.1 wt % sulfur based on the total weight of the catalyst composition;
- and
- a support element disposed between the shell and the substrate.
1 more element
A method of making a substrate supported catalyst comprising:
- applying to a substrate a catalyst composition comprising a catalyst support, a catalytic metal, and a stabilizer comprising less than or equal to 0.1 wt % sulfur based on the total weight of the catalyst composition to form a coated substrate, and calcining the coated substrate.
Dependencies are inferred from the claim text.