초록 ▼

The present invention discloses an exhaust gas catalyst for reducing the pollutant release containing in the exhaust gas. The catalyst includes a primary-core support carrier composed of gamma-phase aluminum oxide. The core-carrier is coated with Y.sub.2 O.sub.3 and ZrO.sub.2 such that the heat resi

The present invention discloses an exhaust gas catalyst for reducing the pollutant release containing in the exhaust gas. The catalyst includes a primary-core support carrier composed of gamma-phase aluminum oxide. The core-carrier is coated with Y.sub.2 O.sub.3 and ZrO.sub.2 such that the heat resistance is greatly improved. A two-layer active catalytic structure is formed over the core-carrier. An inner catalytic layer is formed with composition active catalytic elements with approximate weight ratios of La:Ce:Mn:Co:Pd:=10-15:10-15:6-10:6-10:0.1-0.3. An outer catalytic layer is then coated over the inner catalytic layer. The outer catalytic layer comprises catalytic active elements. The weight ratio of the active catalytic elements are Y:La:Zr:Cu:Cr:V:Pd:=1-3:2-6:2-6:6-10:10-15:2-6:0.1-0.3.

대표청구항 ▼

[ We claim:] [1.] A catalyst for reducing the pollutant release containing in the exhaust gas comprising:a primary-core support carrier comprising a gamma-phase aluminum oxide coated with Y.sub.2 O.sub.3 and ZrO.sub.2 ;an inner catalytic layer comprising La, Ce, Mn, Co, and Pd, formed over said supp

[ We claim:] [1.] A catalyst for reducing the pollutant release containing in the exhaust gas comprising:a primary-core support carrier comprising a gamma-phase aluminum oxide coated with Y.sub.2 O.sub.3 and ZrO.sub.2 ;an inner catalytic layer comprising La, Ce, Mn, Co, and Pd, formed over said support carrier; andan outer catalytic layer comprising Y, La, Zr, Cu, Cr, V, and Pd wherein said element Y has a weight percentage of approximately 0.5%, said outer catalytic layer coated over said inner catalytic layer.