Method of purifying exhaust gas from internal combustion engine

Details Method of purifying exhaust gas from internal combustion engine Method of purifying exhaust gas from internal combustion engine

1997-06-13

1999-12-07

Langel, Wayne

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232137, 4232391, 4232392, B01D 5394

Patent

active

059978309

ABSTRACT:
This method comprises bringing exhaust gas from an internal combustion engine, which is operated at a fuel-lean air/fuel ratio, in contact with an iridium-containing catalyst in a first zone and then in contact with a platinum-containing catalyst in a second zone situated downstream of the first zone. This method is effective for exhaust gas from lean burn engines over a wide temperature range of 200 to 500.degree. C., produces less N.sub.2 O in a low-temperature range of 200 to 300.degree. C., and can purify exhaust gas stably and effectively even at a high temperature of 700.degree. C. or over.

REFERENCES:
patent: 3978193 (1976-08-01), Fedor et al.
patent: 4678770 (1987-07-01), Wan et al.
patent: 5313792 (1994-05-01), Katoh et al.
patent: 5336476 (1994-08-01), Kintaichi et al.
patent: 5413976 (1995-05-01), Takami et al.

Affiliated with

Also associated with

Rating

Method of purifying exhaust gas from internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of purifying exhaust gas from internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of purifying exhaust gas from internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-820393