Catalyst for purifying exhaust gas

Details Catalyst for purifying exhaust gas Catalyst for purifying exhaust gas

1997-09-25

2000-05-23

Dunn, Tom

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 64, 502 74, 502 60, 502326, 502328, 502331, B01J 2904

Patent

active

060665874

ABSTRACT:
A catalyst has a base catalyst layer containing platinum and barium as precious metal supported by alumina and an over catalyst layer containing platinum and rhodium as precious metal supported by zeolitr. The platinum and rhodium in the over catalyst layer activate NOx and HC so as to make them more reactive in terms of energy, and the barium in the base catalyst layer makes the platinum be more dispersive in the base catalyst layer. Under the existence of dispersive platinum, NOx in exhaust gas is decomposed and purified by reaction with reactive NO.sub.2 and partially oxidized HC generated in the over catalyst layer.

REFERENCES:
patent: 4048098 (1977-09-01), Koberstain et al.
patent: 4102813 (1978-07-01), Kimura et al.
patent: 4162235 (1979-07-01), Acres et al.
patent: 4169814 (1979-10-01), Inaba et al.
patent: 4294726 (1981-10-01), Bozon et al.
patent: 4378307 (1983-03-01), Brunelle et al.
patent: 4923842 (1990-05-01), Summers
patent: 5179059 (1993-01-01), Domesle et al.
patent: 5278113 (1994-01-01), Ono et al.
patent: 5338715 (1994-08-01), Iida et al.
patent: 5354720 (1994-10-01), Leyrer et al.
patent: 5422333 (1995-06-01), Kano et al.
patent: 5439865 (1995-08-01), Abe et al.
patent: 5489561 (1996-02-01), Iwakuni et al.
patent: 5543124 (1996-08-01), Yokota et al.
patent: 5571763 (1996-11-01), Takamoto et al.
patent: 5610117 (1997-03-01), Horiuchi et al.
patent: 5643543 (1997-07-01), Guibard et al.
patent: 5753580 (1998-05-01), Hayashi et al.
patent: 5795840 (1998-08-01), Takami et al.
patent: 5804152 (1998-09-01), Miyoshi et al.
patent: 5849254 (1998-12-01), Suzuki et al.
patent: 6004521 (1999-12-01), Miyoshi et al.

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