Method for treating an exhaust gas stream

Details Method for treating an exhaust gas stream Method for treating an exhaust gas stream

1981-08-31

1982-11-23

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

4232132, F01N 302

Patent

active

043598625

ABSTRACT:
Method for filtering combustible particles from an exhaust gas stream, and for periodically rejuvenating the filter bed and catalyst section thereof, by incinerating retained particles. At least a portion of an engine's exhaust gas stream is initially preheated in the catalyst section to raise said section to a predetermined "lightoff" temperature. A supplementary fuel is then introduced to the heated exhaust gas stream prior to the latter entering the catalyst section, thereby causing the fuel/gas mixture to react. Subsequent to initiation of this oxidation reaction, further preheating energy input to increase the exhaust gas to "lightoff" temperature, can be discontinued without affecting the combustible particle incineration rate.

REFERENCES:
patent: 2946651 (1960-07-01), Houdry
patent: 3073684 (1963-01-01), Williams
patent: 3744249 (1973-07-01), August
patent: 3796207 (1974-03-01), Olson
patent: 3892536 (1975-07-01), Roeser
patent: 3940253 (1976-02-01), Zetterstrom
patent: 4033123 (1977-07-01), Masaki
patent: 4169128 (1979-09-01), Sinor
patent: 4212657 (1980-07-01), Urbinati
patent: 4257225 (1981-03-01), Crone

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