Exhaust gas purifying catalyst and exhaust gas purifying method

Details Exhaust gas purifying catalyst and exhaust gas purifying method Exhaust gas purifying catalyst and exhaust gas purifying method

1997-12-05

2000-12-26

Dunn, Tom

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

502326, 502328, 502330, 502 66, 502 64, 4232391, 4232392, B01D 5364

Patent

active

061654299

ABSTRACT:
An exhaust gas purifying catalyst is formed of a first powder formed of porous particles supporting rhodium (Rh), and a second powder formed of porous particles supporting platinum (Pt) and a nitrogen oxides (NOX)-adsorbing material. The second powder and the first powder are present in a mixed state. In this catalyst, Rh is supported apart from Pt and the NOx adsorbent, so that reduction of the oxidizing performance of Pt is prevented, and so that the problems of poor compatibility between Rh and the NOx adsorbent is eliminated. The catalyst therefore maintains high NOx removing rate not only during an initial period but also after the endurance test.

REFERENCES:
patent: 3816594 (1974-06-01), Kobylinski et al.
patent: 3931050 (1976-01-01), Asano et al.
patent: 4012485 (1977-03-01), Meguerian et al.
patent: 4492769 (1985-01-01), Blanchard et al.
patent: 4492770 (1985-01-01), Blanchard et al.
patent: 4675308 (1987-06-01), Wan et al.
patent: 5130109 (1992-07-01), Wan
patent: 5164350 (1992-11-01), Abe et al.
patent: 5376610 (1994-12-01), Takahata et al.
patent: 5459119 (1995-10-01), Abe et al.
patent: 5643542 (1997-07-01), Leyrer et al.
patent: 5700747 (1997-12-01), Kyogoku et al.
patent: 5762892 (1998-06-01), Kasahara

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