Hydrogen Engine Exhaust Aftertreatment

Hydrogen powered combustion engines (H2-ICE) can contribute to a carbon-free energy sector. As vehicle powertrains, they are cheaper and more robust than fuel cells and they have a wider range and shorter refuelling times than battery electric vehicles. However, they emit nitrogen oxides (NOx).

A powerful exhaust gas aftertreatment (EAS) could reduce these emissions to harmless concentrations while giving additional freedoms in combustion development. Eased restrictions in emission calibration can be converted into efficiency, power and transient response. This is the best way to realise a superior powertrain system. Thus, the objective of this project is the fundamental investigation of exhaust gas aftertreatment systems of hydrogen combustion engines.

The project focusses on lean combustion, thus the problem of NOx reduction is comparable to that of diesel engines. Hence, SCR systems and NOx-traps are considered mainly. Fundamental reaction kinetic are investigated, but also the interaction with the combustion system and control strategies.

The investigations base on experimental work mainly. Steady-state and transient load cases will be investigated. During the project also combinations of catalysts are considered. Simulation are engaged to support the experiments and enhance the understanding of the results.

This project has a consortium of IVT, the Institute of Chemical Engineering and Environmental Technology of TU Graz and an industry partner. This project is funded by the FFG.