Studebaker & Brackett PC
Exhaust gas purifying catalyst and exhaust gas purifying method
Disclosed is an exhaust gas purifying catalyst, which comprises a catalyst layer formed on a honeycomb-shaped support. The catalyst layer is formed by mixing a catalyst powder (A) consisting of a composite oxide (RhZrCeNdO) which contains at least Ce, Zr, and a catalytic noble metal composition, and a catalyst powder (B) consisting of a Zr-based oxide (RhZrXO) which contains at least Zr and has Rh existing on a surface thereof. A ratio (RhZrXO/RhZrCeNdO) of a mass of the catalyst powder (B) to a total mass of the catalyst powder (A) and the catalyst powder (B) may be set in the range of 1 to 50%. Further, the catalyst powder (B) may consist of a composite oxide which contains Zr as a primary component, a rare-earth metal except Ce, and Rh. The exhaust gas purifying catalyst of the present invention can provide enhanced exhaust gas conversion efficiency.
Mazda Motor Corporation
B B B B B B Y B B B F B B B B
B01J B01D B01D B01D B01J B01D Y02T B01J B01D B01J F01N B01J B01J B01J B01D
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Seiji Hiroshi Hideharu Akihide Koji
Miyoshi Yamada Iwakuni Takami Minoshima