Method of cleaning exhaust gases

Details Method of cleaning exhaust gases Method of cleaning exhaust gases

1973-12-18

1976-03-30

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

60286, 60289, 60298, B01D 5334

Patent

active

039475441

ABSTRACT:
Internal combustion exhaust gases are catalytically treated and cleaned in a catalyst bed in contact with the exhaust gas conduit of the engine while avoiding overheating and thermal distriction of the catalyst bed according to the present invention by selectively directing a continuous source of heated, secondary air into the catalyst bed then, when the catalyst reaches a predetermined temperature value, the heated air is discharged directly to the atmosphere cooling the exhaust gases, and reducing the temperature of the catalyst bed. The exhaust pipe, upstream of the catalyst, is provided with a double walled conduit and the secondary air is continuously passed through the outer conduit and selectively directed into the catalyst bed or vented to the atmosphere depending upon temperature conditions in the catalyst bed.

REFERENCES:
patent: 3168806 (1965-02-01), Calvert
patent: 3172738 (1965-03-01), Houdry
patent: 3203168 (1965-08-01), Thomas
patent: 3236044 (1966-02-01), Ruge
kirk-Othmer; Encyclopedia of Chemical Technology; 2nd Ed. Vol. 2, pp. 829-830, Interscience Pub.; N.Y.; 1964.

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