โ Scribed by P.J. Bourke; W.H. Denton; M.D. Gray
No coin nor oath required. For personal study only.
dioxide and water vapor were determined in flowing helium at a total pressure of 1 atm. The rates were obtained from continuously recorded weight changes and from intermittent analyses of the effluent gases. The effect of temperature, flow rate, partial pressure of oxidant, and burnoff were examined. The temperature coefficients of the CO,-and HsO-graphite systems were measured in the temperature range of 775-925ยฐC using CO, concentrations of 550 and 1100 vpm (parts per million by volume) and Hz0 concentrations of 110 and 460 vpm. The apparent order of the two systems was studied at 875ยฐC in the concentration ranges of 50 to 1000 vpm of CO, and 30 to 760 vpm of H,O. Strong and about equal retardation of the HzO-graphite reaction was noted upon the addition of either H, or CO. The CO,-graphite reaction also was found to be strongly retarded by either CO or Hz. A comparison of the results obtained for ATJ graphite with those obtained for a purer grade of graphite will be given.
*Research sponsored by the USAEC under contract with the Union Carbide Corporation.
๐ SIMILAR VOLUMES
The oxidation of cobalt has been studied in CO-CO, mixtures in the temperature range 920ยฐC-1200ยฐC. The kinetics of oxidation were determined by using an aut.omatic recording vacuum balance. The mechanism of oxidation was studied through the analysis of kinetics and by marker studies, X-ray analysis
Graphite samples have been exposed to carbon dioxide irradiated with ionizing and non-ionizing radiation. Observations made in an electron microscope of selected areas of graphite before and after exposure to oxidizing species show, at one end of the scale, complete resistance to attack and, at the