Exploring The Oxy-Fuel Combustion In Spark-Ignition Engines For Future Clean Powerplants

Abstract In the context of CO2 challenge, oxy-fuel combustion in internal engines (OFC-ICE) arises as a promising technology for carbon capture and almost zero-NOx solutions. Although literature shows some experimental theoretical works on OFC-ICE, there is lack systematic studies dealing with dilution strategies or where non-synthetic EGR used. Using combination 0D-1D CFD modeling measurements, oxygen (λ > 1) real single-cylinder spark-ignition OFC-ICE here assessed, considering thermo-mechanical limitations knocking. Results show that an strategy more appropriate than O2 dilution. A slightly poor mixture near stoichiometric conditions, rates around 70%, reduces NOx 99%, CO uHC up to 90% respect conventional ICE. It concluded has lower knocking propensity, thus allowing increase compression ratio partially compensate expected efficiency diminution about 4 percentage points.