Sulfur tolerant lean NOx trap

摘要

An integrated lean NOx trap. The integrated lean NOx trap includes a lean NOx trap containing a composite metal oxide mixture consisting essentially of about 80-100 wt % stoichiometric spinel MgAl2O4 and between about 0-20 wt % of CeO2 or CeO2-ZrO2. A method for removing NOx and SOx impurities from exhaust gases using the integrated lean NOx trap is also described.