Abstract
The ignition of hydrogen—oxygen—argon mixtures containing small amounts of CH4, C2H4, CF3Br, and 1,2-C2F4Br2 was studied in a shock tube at 970°—1300°K. All four additives inhibited ignition of the gas mixture, higher temperatures being required to give ignition in a given time than when no inhibitor was present. The additives are consumed during the ignition, CH4 and C2H4 being converted mainly to CO, CF3Br to CF3H, and C2F4Br2 to C2F4 in the relatively rich mixture studied. The data have been correlated in terms of elementary chemical reactions. Pyrolysis of CF3Br and C2F4Br2 was studied to aid in the interpretation of the inhibition process.
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