Abstract: The present invention features a selective reduction catalyst, where half of the catalyst (an inlet) is coated with Mn/TiO2 and another half of the catalyst (an outlet) is coated with Fe-zeolite/ZSM along a substantially longitudinal direction and a washcoat layer is prepared by adding cerium carbonate, thereby forming pores caused by decomposition during calcinations in the washcoat layer and increasing active surface area and performance and efficiency of the catalyst. Also featured are methods of preparation of the selective reduction catalyst.

Abstract: The present invention relates to a method of preparing a double layered, palladium-only three-way catalyst using three different composite oxides. More particularly, the present invention relates to a method of preparing a double layered, palladium-only three-way catalyst comprising a first coating layer (bottom layer) and a second coating layer (top layer) containing palladium by incorporating composite oxide, praseodymium oxide, and perovskite.

Abstract: The present invention relates to a method of preparing a double layered, palladium-only three-way catalyst using three different composite oxides. More particularly, the present invention relates to a method of preparing a double layered, palladium-only three-way catalyst comprising a first coating layer (bottom layer) and a second coating layer (top layer) containing palladium by incorporating composite oxide, praseodymium oxide, and perovskite.

Abstract: A process for manufacturing a palladium ternary catalyst and more particularly, to an improved process for manufacturing a palladium ternary catalyst fabricated by reducing a palladium solution impregnated with or containing alumina, adding a mixing solution consisting of barium oxide, etc., adjusting its pH for further reaction, milling the mixture, coating catalyst material to ceramic monolith substrate, drying and calcining the catalyst material. As a result, a ternary catalyst of this invention containing single layer palladium only can effectively purify the harmful substances derived from automobile exhaust gas, together with cost-saving effects, compared to the conventional ternary catalyst consisting of platinum, rhodium and palladium.