Experimental and Modeling Study of 2-Methylheptane Oxidation in a Flow Reactor, Shock Tube, and Rapid Compression Machine

摘要

Synthetic Fischer-Tropsch (F-T) fuels derived from biomass syngas are renewable fuels that can replace conventional petroleum fuels in jet engine and diesel engine applications. F-T fuels typically contain a high concentration of lightly methylated iso-alkanes, whereas petroleum derived jet and diesel fuels contain large fractions of n-alkanes, cycloalkanes, and aromatics plus some lightly methylated iso-alkanes. A recent experimental and kinetic modeling study of large 2-methylalkanes validated a chemical kinetic model for 2-methylheptane against experimental data obtained in a premixed flame, non-premixed flame, shock tube, and perfectly stirred reactor. In order to further validate models for lightly branched alkanes, this study presents new data for 2-methylheptane oxidation in flow reactor, reflected shock, and rapid compression machine experiments. The flow reactor experiment provides temporal fuel speciation measurements at 840 K and 8 atm, which are important validation targets not available previously for lightly branched alkanes. The ignition delay measurements span pressures from 10 to 25 atm and equivalence ratios of 0.5 to 2.0. Recommendations are made for further constraining the model and improving its predictions of the new detailed measurements.