Process for regenerating a nitrogen oxides storage catalyst
摘要
<p>The present invention provides a process and a device for regeneration of a nitrogen oxides storage catalyst arranged in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy wherein the first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel ratio from a lean to a rich value during a first regeneration period and wherein the second regeneration strategy is applied when the exhaust gas temperature is below said threshold value and comprises switching the air/fuel-ratio between said lean and said rich air/fuel-ratio back and forth forming a sequence of rich/lean-pulses with a number of 2 to 10 rich/lean pulses during a second regeneration period. <IMAGE></p>
申请公布号
EP1386656(A1)
申请公布日期
2004.02.04
申请号
EP20020017245
申请日期
2002.07.31
申请人
UMICORE AG & CO. KG
发明人
ROHR, FRIEDEMANN, DR.;KATTWINKEL, PETER;PETER, STEFAN DIETRICH, DR.;KREUZER, THOMAS, DR. .;LOX, EGBERT, DR.