Kinetics of oxidation of copper sulfide

Ramakrishna, Rao VVVNS and Abraham, KP (1971) Kinetics of oxidation of copper sulfide. In: Metallurgical Transactions, 2 (9). pp. 2463-2470.

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Abstract

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:	Journal Article
Publication:	Metallurgical Transactions
Publisher:	Springer Boston
Additional Information:	Copyright of this article belongs to Springer Boston.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	15 Jun 2010 07:02
Last Modified:	19 Sep 2010 06:08
URI:	http://eprints.iisc.ac.in/id/eprint/28403

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