Method of removing nitrogen oxides from the exhaust gas of a...

Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...

Reexamination Certificate

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Details

C060S274000, C060S295000, C060S297000, C060S301000, C060S303000, C060S311000

Reexamination Certificate

active

10547249

ABSTRACT:
The present invention relates to a method of removing nitrogen oxides from the exhaust gas of a lean-burn internal combustion engine by selective catalytic reduction (SCR) using ammonia. The exhaust gas is routed first over a platinum-containing pre-catalyst and then over an SCR catalyst. The ammonia needed for the selective catalytic reduction is added to the exhaust gas upstream of the pre-catalyst at an exhaust-gas temperature below 250° C., while it is supplied to the exhaust gas between the pre-catalyst and the SCR catalyst at an exhaust gas temperature above 150° C. By adopting this procedure, a very large temperature range for the selective catalytic reduction with high nitrogen conversion rates is obtained.

REFERENCES:
patent: 4510265 (1985-04-01), Hartwig
patent: 4828807 (1989-05-01), Domesle et al.
patent: 6173568 (2001-01-01), Zurbig et al.
patent: 6314722 (2001-11-01), Matros et al.
patent: 2001/0002244 (2001-05-01), Gieshoff et al.
patent: 2002/0039550 (2002-04-01), Schafer-Sindlinger et al.
patent: 2002/0054844 (2002-05-01), Pfeifer et al.
patent: 2003/0014194 (2003-01-01), Fischer
patent: 2003/0209011 (2003-11-01), Duvinage et al.
patent: 2004/0209769 (2004-10-01), Demel et al.
patent: 100 11 612 (2000-10-01), None
patent: 0 666 099 (1995-08-01), None
patent: 1 027 919 (2000-08-01), None
patent: 1 176 290 (2002-01-01), None
patent: 10 156 144 (1998-09-01), None
patent: 2000265828 (2000-09-01), None
patent: WO 00/74823 (2000-12-01), None
patent: WO 01/64319 (2001-09-01), None
patent: WO 2004/076829 (2004-09-01), None
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