内燃機関のリーン排ガス中の窒素酸化物の選択的接触還元のための排ガス浄化装置および排ガス浄化法

Japanese Patent JP2006519332

A

The present invention relates to an exhaust-gas purification system for the selective catalytic reduction of nitrogen oxides. The system includes at least one catalyst having catalytically active components for the selective catalytic reduction (SCR components). An NOx storage catalyst ( 5 ) is arranged upstream of the SCR catalyst ( 3 ) in the exhaust-gas purification system. For performing the selective catalytic reduction, metering means ( 8 ) for supplying a compound decomposable into ammonia is provided between the NOx storage catalyst and the SCR catalyst ( 3 ). At low exhaust-gas temperatures, the NOx storage catalyst ( 5 ) adsorbs the nitrogen oxides contained in the exhaust gas and desorbs them only at rising exhaust-gas temperatures, so that they can afterwards be converted by the SCR catalyst ( 3 ) which is active then. This results in an altogether improved conversion rate for the nitrogen oxides.

Marx Pfeiffer
Barry fan setten
Paul Spruku
Jürgen Guieshof
Egbert Rocks
Thomas Kreuzer

JP2006501965A

August 24, 2006

February 26, 2004

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Umicore AG & Co.KG

F01N3/08; B01D39/10; B01D39/14; B01D39/20; B01D53/56; B01D53/94; F01N3/02; F01N3/10; F01N3/20; F01N3/24; B01D46/42; F01N13/02

JPH08246849A	1996-09-24
JP2000230414A	2000-08-22
JP2000008833A	2000-01-11
JP2002200413A	2002-07-16
JP2003286827A	2003-10-10
JPH0994434A	1997-04-08
JP2002364338A	2002-12-18
JPH1080620A	1998-03-31
JPH11223123A	1999-08-17
JP2002188429A	2002-07-05
JP2001193443A	2001-07-17
JP2000157870A	2000-06-13
JP2002047919A	2002-02-15

WO2003002854A1	2003-01-09
WO2002026379A1	2002-04-04

Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel

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