Abstract
Measurements are reported of the profiles of composition and temperature in laminar premixed flat flames of CH 4N 2OAr and CH 4O 2Ar. Measurements were made in near stoichiometric mixtures at 30 torr by molecular beam sampling and mass spectrometric sample analysis. All major stable species and many important unstable species were measured by this technique, many species being identified in the flame with N 2O as oxidizer for the first time. Calibration of the concentration profiles was accomplished by the use of calibration gases for stable species and by comparison of the mass spectrometer signal in the well-characterized CH 4O 2Ar flame with signals in the CH 4N 2OAr flame and by partial equilibrium for the hydrogenoxygen system. The measurements have identified the presence of NCO, HCN, and HNCO as reaction intermediates and the importance of these species in the reaction mechanism is discussed.
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