Catalyst and method for purifying exhaust gas from vehicle engines
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorSang-cheol Park
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Abstract
A catalyst, method, and exhaust system for purifying exhaust gas from vehicle engines, including a catalyst having a carrier doped with copper oxide (CuO), and a precious metal as a main catalyst is disclosed. The impregnation of copper oxide into the carrier protects the catalyst from damage due to the toxicity of exhaust gas, and hinders agglomeration of precious metal particles used as the main catalyst. As a result, the heat resistance of the catalyst at high temperatures in addition to the catalytic activity for the oxidation of particulates can be improved.
Claims16
A catalyst for purifying exhaust gas from vehicle engines, comprising:
- a carrier pre-doped with copper oxide (CuO);
- at least one precious metal as a main catalyst selected from the group consisting of platinum (Pt), palladium (Pd), rhodium (Rh) and rhenium (Re), wherein the at least one precious metal is doped on the surface of the pre-doped carrier;
- and
- at least one metal oxide as a co-catalyst selected from the group consisting of antimony trioxide (Sb2O3), bismuth trioxide (Bi2O3), tin dioxide (SnO2), and mixtures thereof, wherein the at least one metal oxide is doped on the surface of the pre-doped carrier.
Dependencies are inferred from the claim text.