By Lisa Pesch, Gudrun Murray
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18. The simulations shown in Fig. 5 the concentration of the oxidizing radicals O• and OH• (filled symbols) reaches the maximum shortly after entering the reaction zone while the portion of the reducing gases H and H2 vanishes very fast. 85, the concentration of O/OH compared to H/H2 is clearly lower. It is of vital importance that the concentration of OH• can be adjusted by changing φ as can be seen for the results found for HAB>25 mm. A high concentration of oxidizing species is vital for the oxidation process and their concentration with respect to height above burner is indicative of the degree of 36 H.
Because NO is added as a tracer, the effect of different NO concentrations on the temperature measurements was investigated. The NO concentration was varied between 100 and 1,000 ppm while all other parameters were kept constant. No effect on the temperature results could be detected. 2 Diagnostics for Species Concentration Using a similar arrangement of tunable pulsed UV laser and camera, many atomic and molecular species can be imaged in the flame. , [44]), the additional detection of atoms and molecular intermediates that occur in nanoparticle synthesis of metal oxides provides valuable input for the understanding of the reaction system.
8 shows measured two-dimensional temperature and Fe(I)-concentration distributions for a flame with 68 ppm Fe(CO)5 . One-dimensional profiles along the flow coordinate were taken by averaging the temperature and concentration data for each y position within the central 10 mm of the burner chamber. 8b shows the resulting Fe(I)-concentration profiles for three different Fe(CO)5 concentrations. The different zones of the flame were investigated by translating the burner to different positions within the chamber which slightly changes the flame conditions.
