Shock tube measurements of the reaction behaviour of acetylene with O‐atoms

By the direct measurement of the time dependent concentrations of H‐ and O‐atoms in the reaction zone behind shock waves using the ARAS‐technique, the reaction behaviour of acetylene with O‐atoms in the temperature range 1500 K ≤ T ≤ 2570 K at pressures of about 2 bars was investigated. The gas mixtures used consisted of argon with small initial concentrations of N2O (10 ppm to 100 ppm) and C2H2 (10 ppm to 25 ppm). Under the present conditions the results indicate a dominant influence of the reaction channels magnified image Which can be directly followed by the experiment. A good interpretation of the measurements is possible using the reaction rate coefficients Extensive computer simulations with different models of secondary reactions show the dominant influence of the two given reaction channels for the present conditions and yield a practically perfect fit of the experimental values.