Exhaust gas purification device comprising a nitrogen oxide adsorber and method for desulphatizing therefore

A method for desulfating a nitric oxide (NO) adsorber in an exhaust gas purification apparatus for a combustion unit compris operating the combustion unit so the exhaust gas composition oscillates between rich and lean during the desulfating process, th excess oxygen during the lean periods being co...

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Bibliographische Detailangaben
Hauptverfasser:	VOIGTLAENDER, DIRK, HERTZBERG, ANDREAS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method for desulfating a nitric oxide (NO) adsorber in an exhaust gas purification apparatus for a combustion unit compris operating the combustion unit so the exhaust gas composition oscillates between rich and lean during the desulfating process, th excess oxygen during the lean periods being collected in a reservoir downstream of the NO adsorber for release during the rich periods to oxidize sulfur compounds. An Independent claim is also included for an exhaust gas purification apparatus for a combustion unit, comprising a NO adsorber, means for establishing an oscillating rich and lean exhaust gas composition during the desulfating process, and an oxygen reserv downstream of the NO adsorber.