EXHAUST SYSTEM FOR AN AMMONIA-BURNING COMBUSTION ENGINE

The present invention relates to a system (32) for ammonia combustion and exhaust gas treatment, the system (32) comprising: an internal combustion engine (30) for combusting ammonia; and an exhaust system (34) comprising an intake (40) for receiving an exhaust gas from the combustion engine (30), an upstream injector (46) for adding hydrogen gas to the exhaust gas and a downstream catalyst article (50), wherein the downstream catalyst article (50) comprises a three-way catalyst composition. The invention further relates to a method for the treatment of an exhaust gas from an ammonia internal combustion engine (30).