Browsing by Author "Burdett, Nigel A."

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    Kinetics of Gas Phase Electron—Ion Recombination by NO++e -> N-rO from Measurements in Flames
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (1), 1978) Burdett, Nigel A.; Hayhurst, Allan N.
    Mass spectrometric measurements of ion concentrations in the burnt gases of flames of either C2H2 + O2+N2 + occasionally trace amounts of NO or H2 + O2 + N2 with small additions of C2H2 and NO have enabled the rate coefficient, kit for electron-ion recombination in reaction (I) NO++e-->N+O (I) to be determined. Such measurements have been made for a wide variety of flame conditions over the temperature range 1820 to 2650 K and indicate that changes from 2.3xl0~7 to 1.4x 10-' ion-1 cm3 s~‘. At the lower temperatures kt varies as T-0’7, but as T~l's at the hotter ones. There is evidence that circumstances can be devised in flames, when charged species are produced by chemi-ionization in the reverse of reaction (I), whose rate coefficient is found to be 6.7 x 10'12 exp (-31 900/T) atom-1 cm3 s"1 from 1820 to 2650 K.
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    Kinetics of Gas Phase Ion-Ion Recombination in NO++X- ->NO+X for X being Chlorine, Bromine and Iodine
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (1), 1978) Burdett, Nigel A.; Hayhurst, Allan N.
    The rate coefficient for the gas phase recombination of N0+ with halide ions X- in NO++X-->NO+X has been measured in flames of C2H2 + O2 + N2 over the temperature range 2200 to 2650 K. Chlorine, bromine and iodine have been used as X. All At values are in the range 0.8-2.lx 10~8 ion -1 cm3 s-1, corresponding to cross-sections (tto2) of ~10-17 m2. For each halogen, ki has a negative temperature coefficient. Also at any one temperature, kt is largest for X being chlorine and smallest for iodine. In general, these measurements are in agreement with Olson’s “ absorbing sphere ” model for ion-ion recombination.