Abstract
AT temperatures below 300° C the rate of oxidation of coal and char decreases with increasing time of oxidation, or alternatively with increasing extent of oxidation. Two types of equations have been widely used to represent the experimental curves relating the rate of oxygen uptake dq/dt to the time t or the total uptake q
where D, E, F and G are constants for a given set of experimental conditions. Carpenter and Sergeant3 have observed deviations from the Elovitch type equation and suggested that they result from fresh sorption sites being created by the evolution of the gaseous oxidation products during the oxidation of coal.
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References
Schmidt, L. D., and Elder, J. L., Indust. Eng. Chem., 32, 249 (1940).
Wood, T., J. App. Chem., 8, 565 (1958).
Carpenter, D. L., and Sergeant, G. D., Fuel, 45, 311 (1966).
Taylor, H. A., and Thon, N., J. Amer. Chem. Soc., 74, 4169 (1952).
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NEWMAN, J., STANLEY, L., EVANS, P. et al. Kinetics of Low Temperature Oxidation of Coal and Char. Nature 213, 280 (1967). https://doi.org/10.1038/213280a0
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DOI: https://doi.org/10.1038/213280a0
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