Reductant distributor for lean NOx trap

Details Reductant distributor for lean NOx trap Reductant distributor for lean NOx trap

2006-12-26

2006-12-26

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S295000, C060S297000, C060S303000, C060S324000, C239S399000, C239S432000, C222S145500, C222S145600

Reexamination Certificate

active

07152396

ABSTRACT:
A lean NOx trap operating in a lean NOx exhaust stream is progressively regenerated, sector to sector, for efficient operation of the trap and conservation of reducing gas used in the regeneration. A reductant gas distributor is inserted in the exhaust upstream of the trap. Reductant gas is carried into the exhaust duct through a conduit portion and the reductant gas stream diverged and directed through a distributor into selected cells of the trap. The NOx in the selected cells is reduced to N2while lean NOx exhaust continues to flow through the remainder of the trap. By relative movement of the reductant gas distributor and the trap, the entire trap is progressively and continually regenerated while still preforming as a NOx trap.

REFERENCES:
patent: 5542249 (1996-08-01), Heath
patent: 6444177 (2002-09-01), Muller et al.
patent: 6449947 (2002-09-01), Liu et al.
patent: 6601385 (2003-08-01), Verdegan et al.
patent: 6722123 (2004-04-01), Liu et al.
patent: 6745562 (2004-06-01), Berriman et al.
patent: 6775973 (2004-08-01), Liu et al.

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