Purifying catalyst for exhaust gas from internal combustion...

Details Purifying catalyst for exhaust gas from internal combustion... Purifying catalyst for exhaust gas from internal combustion...

B - Operations, Transporting

01

J

252/48, 252/50

B01J 23/63 (2006.01) B01D 53/94 (2006.01) B01J 35/10 (2006.01) B01J 37/02 (2006.01)

Patent

CA 2194031

A purifying catalyst for the exhaust gas from the internal combustion engine of an automobile, for example, is disclosed which excels in the purifying ability in quick response to the atmosphere of the exhaust gas largely varying with changes in the operating condition of the engine involving such phases as idling, acceleration, constant-speed drive, and deceleration. The purifying catalyst contains rhodium, palladium, a cerium compound, and a refractory inorganic oxide as catalytic components carried on a refractory carrier and comprises at least two catalyst layers, namely a catalyst layer containing the cerium compound and a catalyst layer containing palladium.

n décrit un catalyseur pour la purification des gaz d'échappement, par exemple, du moteur à combustion interne d'une voiture qui excelle par sa capacité de purification, qui réagit rapidement à la composition des gaz d'échappement qui varie considérablement en fonction des changements de régime du moteur, dont la marche au ralenti, l'accélération, la conduite à vitesse constante et la décélération. Le catalyseur contient du rhodium, du palladium, un composé de cérium, un oxyde inorganique réfractaire comme éléments catalytiques sur un support réfractaire ainsi qu'au moins deux couches catalytiques, à savoir une couche catalytique contenant le composé de cérium et une autre contenant le palladium.

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