Abstract
The kinetics and mechanism of the oxidation of cupric sulphide mixed with ignited alumina have been studied in a fluidised bed. Incorporation of alumina has been found necessary to maintain uniform and continued fluidisation. The product distribution as well as the mechanism of oxidation in the presence of alumina in a fluidised bed is completely different from that in a fixed bed of pure copper sulphide (reported in Part I). The reaction is no longer autocatalytic and copper sulphate, instead of cuprous oxide (formed in the fixed bed), was the main solid product. Both of the following two rate-expressions represent the kinetics of oxidation quite satisfactorily: ▪Tthe correspondence between the two equations has been established. The role of alumina in altering the mechanism of the oxidation of cupric sulphide has also been discussed.
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