Colloquium: Maria Teresa Cadete Gonçalves (FPT)

The rising concern over pollutant emissions, particularly nitrogen oxides (NOx) and carbon dioxide (CO2), has driven research into cleaner combustion solutions. Moderate or Intense (Oxygen) Dilution (MILD) combustion, facilitated by exhaust gas recirculation (EGR), effectively reduces NOx emissions. Hydrogen, as a carbon-free fuel, shows promise for lowering CO2 emissions, though it presents challenges such as flashback risks and increased NOx production due to higher flame temperatures. Ammonia (NH3) could enhance hydrogen combustion stability but may also elevate NOx emissions. This thesis, part of the ACHIEVE project, investigates the combustion of methane-hydrogen blends using the TU Delft Enclosed-Jet-in-Hot-Coflow (EJHC) burner in MILD conditions. Experimental campaigns assessed coflow uniformity and flame behavior, revealing that hydrogen addition reduced lift-off height and influenced NO emissions. This research establishes a foundation for exploring the combustion characteristics of ammonia-hydrogen blends.

Supervisor: Dr. Francesca De Domenico