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US08258070B2 Engine exhaust catalysts containing palladium-gold 失效
含有钯金的发动机废气催化剂

Engine exhaust catalysts containing palladium-gold
Abstract:
An emission control catalyst that exhibits improved CO and HC reduction performance includes supported precious group metal catalysts that are coated onto different layers of the substrate for the emission control catalyst. Zeolites of one or more types are added to the emission control catalyst as a hydrocarbon absorbing component to boost the low temperature performance of the emission control catalyst. Y zeolite is used by itself or mixed with other zeolites to enhance hydrocarbon storage at low temperatures.
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