Chemical Structures of Fuel-Rich, Premixed, Laminar Flames of C₆H₅Cl/CH₄/O₂/Ar Mixtures

Abstract

Chemical structures of atmospheric-pressure, fuel rich (sooting) premixed, laminar, flat flames of C₆H₅Cl and CH₄ have been investigated using a flat flame burner. Species mole fraction profiles were determined by using micro-probe sampling coupled to on-line gas chromatography/mass spectrometry. In addition to those of reactants, mole fraction profiles have been determined for CO, CO₂, HCl, H₂O, H₂, C₂H₆, C₂H₄, C₂H₂, C₄H₂, C₄H₄, C₅H₆, C₆H₆, C₆H₅CH₃, C₆H₅C₂H₃, C₆H₅C₂H, C₆H₅OH, ClC₆H₄OH, ClC₆H₄CH₃, C₆H₄Cl₂, and C₁₀H₈. In a fuel lean flame of pure C₆H₅Cl highly chlorinated hydrocarbons such as CCl₄, Cl₂C₆H₃OH, C₅HCl₄, C₂HCl₃, C₆H₃Cl₃ and C₂Cl₄ were also observed. The roles of these species, in view of the current ideas of the mechanism of combustion of C₆H₅Cl are discussed.