Contents Appendix E. Fuel Chemistry Sets Included with Ansys Forte | Print page E.3. Reduced Mechanisms for Natural Gas SI Engine ApplicationsThis section describes a chemistry set for natural gas SI engine applications. « E.2.3. TRF-Ethanol Model for Spark-Ignition Gasoline for Knocking Conditions and Gasoline HCCI Engine Simulations, with a Focus on Soot Using Pseudo-Gas Model E.3.1. Natural Gas 1-Component Surrogate (Methane) for SI Engine Emissions Predictions »