Suggested Citation:
Kornbluth, Kurt L., Zach McCaffrey, Paul A. Erickson (2009) Incorporating In-Cylinder Pressure Data to Predict NO_x 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 NO_x came within 25% of predicting the measured NO_x emissions.

Keywords: hydrogen, engine modeling, NO_x, spark-ignition, landfill gas, natural gas