NO.sub.x reduction method

Details NO.sub.x reduction method NO.sub.x reduction method

1993-02-18

1996-06-18

Heyman, Leonard

Power plants

Internal combustion engine with treatment or handling of...

Methods

60282, 423212, 423235, 123585, F01N 308, B01D 5356, B01D 5392

Patent

active

055266410

ABSTRACT:
A method of reducing oxides of nitrogen (NO.sub.X) in the exhaust of an internal combustion engine includes producing oxygen enriched air and nitrogen enriched air by an oxygen enrichment device. The oxygen enriched air may be provided to the intake of the internal combustion engine for mixing with fuel. In order to reduce the amount of NO.sub.X in the exhaust of the internal combustion engine, the molecular nitrogen in the nitrogen enriched air produced by the oxygen enrichment device is subjected to a corona or arc discharge so as to create a plasma and as a result, atomic nitrogen. The resulting atomic nitrogen then is injected into the exhaust of the internal combustion engine causing the oxides of nitrogen in the exhaust to be reduced into nitrogen and oxygen. In one embodiment of the present invention, the oxygen enrichment device that produces both the oxygen and nitrogen enriched air can include a selectively permeable membrane.

REFERENCES:
patent: 5051113 (1991-09-01), Nemser
patent: 5051114 (1991-09-01), Nemser et al.
Hilliard, J. C. and F. J. Weinberg, "Effect of nitrogen--containing plasmas on stability, NO formation and sooting of flames", Nature, vol. 259, pp. 556-557, Feb. 19, 1976.

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