Summary
A procedure is given for calculating the oxidation kinetics of porous materials obeying a parabolic law of oxidation. The procedure is based cn Zel'dovich's theory. The relations obtained for the reagent concentration, the maximum penetration depth, and the total weight gain as functions of time, temperature, and pore structure, afford a qualitative explanation of all the experimentally observed regularities.
The method can be used to calculate the kinetics of diffusion saturation of porous substances by the gas phase, and also of chemical precipitation from solution.
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I. M. Fedorchenko, A. P. Lyapunov, and V. V. Skorokhod, Powder Metallurgy, No. 13 (1963).
D. A. Frank-Kamenetskii, Diffusion and Heat Transfer in Chemical Kinetics [in Russian] (Izd-vo AN SSSR, Moscow, 1947).
Ya. B. Zel'dovich, ZhFKh,13, 163 (1939).
E. Wheeler, Catalysis: Theoretical Problems and Methods of Investigation [Russian translation] (1955).
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Denisenko, É.T. Macrokinetics of oxidation of porous substances. Powder Metall Met Ceram 3, 386–390 (1965). https://doi.org/10.1007/BF00774237
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DOI: https://doi.org/10.1007/BF00774237