Accession Number : AD0454936


Title :   CO-OXIDATION. II. INFLUENCE OF H2 ON THE INDUCTION PERIOD PRECEDING RAPID CO2-FORMATION IN SHOCK HEATED CO-O2-AR MIXTURES,


Corporate Author : GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CALIF


Personal Author(s) : Sulzmann,K G P ; Myers,B F ; Bartle,E R


Report Date : Nov 1964


Pagination or Media Count : 30


Abstract : The influence of small amount of hydrogen on the induction period, Tau(i), preceding rapid CO-oxidation in argon diluted CO-O2-mixtures, has been studied at temperatures between 1500 and 3300K and at pressures between 0.4 and 1.6 atm behind incident shock waves. The initial reaction regime was investigated by using spectral portions of the CO2-nu(3)-fundamental and CO-fundamental infrared bands and spectral portions of the CO-flame emission. Up to 0.13% hydrogen was used in dilute mixtures containing between 5 and 20% O2 and between 10 and 20% CO. For constant temperature and hydrogen concentration, Tau(i) is inversely proportional to the square roots of the inital mole concentrations of CO and O2. The induction period is generally decreased with increasing amounts of hydrogen present, however, above 2400K for an initial hydrogen concentration of 0.011% this effect becomes negligible. Under the latter conditions, the dependence on temperatuer of Tau(i) can be represented by an apparent activation energy of 40 kcal/mole (=10%). It is demonstrated that a modified Haber-Semenov mechanism can be used to account qualitatively for the observed dependence on hydrogen of the induction period. (Author)


Descriptors :   *CARBON COMPOUNDS , MONOXIDES , OXIDATION , EXPERIMENTAL DATA , HIGH TEMPERATURE , MIXTURES , OXYGEN , IGNITION , DETERMINATION , SHOCK WAVES , HYDROGEN COMPOUNDS , ARGON , CHEMICAL REACTIONS , TEST METHODS , PRESSURE , INFRARED SPECTRA , CARBON DIOXIDE


Distribution Statement : APPROVED FOR PUBLIC RELEASE