Influence of Mixture Temperature and Equivalence Ratio on Reaction Products of n-heptane before Auto-ignition

Abstract

A comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometer (GC x GC - TOFMS) was used for analysis of gas composition in a constant volume combustion chamber before ignition. For mass spectrometer, electron ionization and field ionization were used in order to estimate molecular formula and identify chemical compounds. Reaction intermediates produced from n-C₇H₁₆/O₂/Ar mixture were analyzed in this study. About oxygen-containing hydrocarbons, it was suggested that the concentration of reaction products from φ=5.0 were more than 10 times as high as in comparison with those of φ=1.0.