Exhaust gas catalyst and method of manufacturing same

Details Exhaust gas catalyst and method of manufacturing same Exhaust gas catalyst and method of manufacturing same

2007-06-12

2007-06-12

Nguyen, Cam N. (Department: 1754)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S302000, C502S303000, C502S304000, C502S326000, C502S332000, C502S333000, C502S334000, C502S339000, C502S349000, C502S439000

Reexamination Certificate

active

10905855

ABSTRACT:
The present invention involves an exhaust gas catalyst and method of manufacturing same. The invention provides for a cost-effective material which lowers the cold-start emissions from the exhaust of vehicles. The invention is a passive system which accelerates the light-off temperature of catalyst in a cost-effective fashion. The invention includes a method of manufacturing an exhaust gas catalyst capable of lowering cold-start emissions including the steps of providing an oxide mixture having praseodymium and cerium, doping about 0–10% weight zirconium and about 0–10% weight yttrium to the oxide mixture, adding about 0–2% weight metal including palladium, platinum, or rhodium to the oxide mixture, mixing gamma aluminum to the oxide mixture for washcoating and washcoating the oxide mixture onto a monolithic substrate.

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