Exhaust gas purification device for vehicle IC engines has hydrogen sulfide conversion unit connected to a nitrogen oxide adsorber

摘要

An exhaust gas purification device has a hydrogen sulfide conversion unit (5) connected to a nitrogen oxide adsorber (4). The conversion unit has a conversion material formed in the starting state of a metal oxide which reacts with hydrogen sulfide to produce the corresponding metal sulfide releasing water. The metal sulfide is converted back into the metal oxide by introducing oxygen releasing sulfur dioxide.