Catalytic Converter Configuration and Method for Desulfurizing a NOx Storage Catalytic Converter
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United States of America Patent
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Issued Date -
Feb 21, 2008
app pub date -
Aug 16, 2007
filing date -
Aug 16, 2006
priority date (Note) -
Abandoned
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Abstract
A catalytic converter configuration for an internal combustion engine that is capable of running lean has an exhaust gas duct and a NO.sub.x storage catalytic converter arranged in the exhaust gas duct. A novel method allows desulfurizing the NO.sub.x storage catalytic converter. An H.sub.2S storage catalytic converter is provided. This catalytic converter is capable of storing hydrogen sulfide under a rich or stoichiometric exhaust gas atmosphere with lambda.ltoreq.1 and oxidizing hydrogen sulfide under a lean exhaust gas atmosphere with lambda>1.
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