| abstract |
A method of desulfurization of a ceramic storage medium ( 10, 12 ) for sulfur oxides and/or nitrogen oxides situated in a gas stream, in particular a storage device for nitrogen oxides or sulfur oxides situated in the exhaust gas stream of an internal combustion engine is described, a mixture having a low oxygen concentration being established in the gas stream to release the stored sulfur oxides. A measuring signal is recorded by an oxygen probe ( 14 ) situated downstream from the storage medium ( 10, 12 ) in the direction of flow of the gas stream, the curve of this measuring signal being used to determine the loading of the storage medium ( 10, 12 ) with sulfur oxides. This method makes it possible to determine the need for desulfurization as a function of the loading of the storage medium ( 10, 12 ) with sulfur oxides, to monitor and control the progress of desulfurization initiated and to check on how complete the desulfurization that is concluded has been. |