Catalyst for purification of diesel engine exhaust gas

Details Catalyst for purification of diesel engine exhaust gas Catalyst for purification of diesel engine exhaust gas

1996-07-25

1999-06-15

Beck, Shrive

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

502304, 502313, 502326, 502328, B01J 802

Patent

active

059119616

ABSTRACT:
A catalyst for the purification of diesel engine exhaust gas is disclosed which excels in the ability to remove by combustion unburnt hydrocarbons and carbon monoxide as well as minute carbon particles in a wide temperature range from a low temperature zone upward. This catalyst for the purification of diesel engine exhaust gas comprises by having a three-dimensional structure coated with (A) a platinum and/or palladium-carrying refractory inorganic oxide powder obtained by depositing platinum and/or palladium and the catalytically active oxide of at least one metal selected from the group consisting of tungsten, antimony, molybdenum, nickel, vanadium, manganese, iron, bismuth, cobalt, zinc, and alkaline earth metals on (a) a first refractory inorganic oxide powder and (B) a catalyst composition formed of (b) a second refractory inorganic oxide powder and having the platinum and/or palladium contained therein in an amount in the range of from 5 to 50% by weight, based on the amount of (a) the first refractory inorganic oxide powder.

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European Search Repurt, May 16, 1995.
Japanese Patent Abstract: JP 59142851, vol. 8, No. 266, Aug. 1994.

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