Kinetics of oxidation of copper sulfide

Ramakrishna Rao, V. V. V. N. S. ; Abraham, K. P. (1971) Kinetics of oxidation of copper sulfide Metallurgical and Materials Transactions B, 2 (9). pp. 2463-2470. ISSN 1073-5615

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The oxidation rate of a cuprous sulfide pellet suspended in a stream of air was followed by measuring the evolution of SO2 titrimetrically. Thin thermocouples embedded in the center of the sample recorded the variation of temperature during oxidation. The reaction was found to be topochemical and the sample temperature was found to be higher than its surroundings initially for about half an hour. After this initial period, the sample temperature decreased to that of the surroundings and remained constant during the rest of the period of over 5 hr. The apparent activation energy from the experimental data was found to be different for the initial (nonisothermal) and subsequent (isothermal) periods. Rate controlling mechanisms for these two intervals have been proposed based on interface chemical reaction, mass transfer resistance, and heat transfer concepts. Fair agreement is found between the theoretical rates based on transport mechanisms and those obtained experimentally.

Item Type:Article
Source:Copyright of this article belongs to Springer-Verlag.
ID Code:12242
Deposited On:10 Nov 2010 04:58
Last Modified:16 May 2016 21:37

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