Staged reductant injection for improved NO.sub.x reduction

Details Staged reductant injection for improved NO.sub.x reduction Staged reductant injection for improved NO.sub.x reduction

1998-11-13

2000-10-03

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

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

60284, 60303, 60295, F01N 300

Patent

active

061256293

ABSTRACT:
An external reductant for an SCR vehicular NO.sub.x emission control system is selectively injected to SCR catalysts which are only at catalytically active temperatures thereby avoiding reductant absorption in catalytically unactive catalysts and improving conversion response time.

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Manfred Koebel, Martin Elsener and Thomas Marti, NOx-Reduction in Diesel Exhaust Gas with Urea and Selective Catalytic Reduction, Combustion Technology Division, Paul Scherrer Institute (PSI), Switzerland, Received Jul. 24, 1996, CCombus. Sci. and Tech., 1996 vol. 121, pp. 85-102.

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