NH3 is considered a promising fuel for large engines and in particular for international shipping applications, as there is no CO2 produced from its combustion. However, high concentrations of the pollutants NOx, NH3 and N2O can be released. The aim of this project is to develop recommendations for exhaust aftertreatment systems that reduce pollutant emissions from NH3-fuelled engines. Catalytic experiments will be performed in a wide range of concentrations of pollutants and other feed components (O2, H2O etc.) as well as temperature in order to provide recommendations for aftertreatment setups and catalyst compositions depending on these operation conditions. There will be a general screening of suitable catalysts, but currently Fe-exchanged zeolites seem most promising to remove N2O and NOx from exhaust gases with the help of NH3.
