METHOD AND EXHAUST GAS SYSTEM FOR SCRUBBING EXHAUST GASES CONTAINING SOx, IN PARTICULAR ONBOARD INTERNAL COMBUSTION ENGINES OF SHIPS

摘要

The invention relates to a method for removing pollutants from an exhaust gas stream of an internal combustion engine (12) that uses a fuel containing sulfur, wherein the exhaust gas stream contains at least 1,000 mg of sulfur oxides (SOx) per standard cubic meter and wherein the method comprises the steps of: contacting the exhaust gas stream with a solid adsorbent (22) or with a scrubbing solution, wherein acidic pollutants, including sulfur dioxide and sulfur trioxide, are bound chemisorptively; adding at least a portion of a reducing agent or a chemical precursor thereof to the exhaust gas stream; then passing the exhaust gas stream through a particle filter (18), wherein organic and inorganic particles are separated; and then feeding the exhaust gas stream to a catalyst (20), wherein nitrogen oxides are catalytically converted by way of the reducing agent added to the exhaust gas. The device according to the invention comprises a desulfurization stage, a particle filtration stage and a denitrification stage.