Sustainable Transportation Energy Pathways (STEPS)
Available online at doi: 10.1016/j.ijhydene.2009.09.020
Kornbluth, Kurt L., Zach McCaffrey, Paul A. Erickson (2009) Incorporating In-Cylinder Pressure Data to Predict NOx Emissions from Spark-Ignition Engines with Landfill Gas/Hydrogen Mixtures. International Journal of Hydrogen Energy 34 (22), 9248 - 9257
A 0.745 L 2-cylinder spark-ignition engine was operated with compressed natural gas and with simulated landfill gas (60% CH4 and 40% CO2 by volume) containing hydrogen concentrations of 0, 30%, 40%, and 50% (by volume of the CH4 in the fuel) at constant rpm. This empirical data was compared with predictions from three existing semi-empirical engine models, using a first-law-based finite heat release model to correlate measured incylinder pressure data and burn rate for each fuel mixture. Of the three models only a two zone model incorporating thermal and prompt NOx came within 25% of predicting the measured NOx emissions.
Keywords: hydrogen, engine modeling, NOx, spark-ignition, landfill gas, natural gas