Adcat exhaust treatment device

Details Adcat exhaust treatment device Adcat exhaust treatment device

1995-04-10

1996-04-23

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422169, 422170, 422177, 422180, 422189, 422190, 60297, B01D 5000, F01N 310

Patent

active

055100864

ABSTRACT:
The invention relates to a catalytic converter system for controlling exhaust emissions from a combustion engine wherein the catalytic converter has three catalysts zones. A zone which is first in line with the direction of the flow of exhaust and which includes a light-off catalyst such as palladium. A second zone in line of the direction of the exhaust flow includes a hydrocarbon adsorber/catalyst. A third zone in line of the direction of the exhaust flow includes a catalyst system converter CO and NO.sub.x. The three-zone system of the present invention produces hydrocarbon efficiencies above 98 percent and retains hydrocarbon efficiencies above 50 percent in cold performance situations immediately after start-up of the combustion engine.

REFERENCES:
patent: 4556543 (1985-12-01), Mochida et al.
patent: 5125231 (1992-06-01), Patil et al.
patent: 5229079 (1993-07-01), Harada et al.
patent: 5233830 (1993-08-01), Takeshima et al.
patent: 5296198 (1994-03-01), Abe et al.

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