Abstract:
Molecular beam mass spectrometry with photoionizationby synchrotron radiation was used to study the structure of flat premixed flames of C$_2$H$_4$/O$_2$/Ar and C$_2$H$_4$/C$_2$H$_5$OH/O$_2$/Ar at a pressure of 30 torr (4 kPa) with equivalence ratios $\varphi$ = 1 and 2. It was shown that the replacement of part of ethylene with ethanol in the starting mixture lowered the concentration of a number of intermediate flame species, including soot precursors C$_3$H$_3$ and C$_6$H$_6$. These data are important for the development, analysis, and further improvement of detailed kinetic mechanisms for combustion of mixtures of hydrocarbon and oxygenated fuels.