Sofekun, Ore A. ; Doraiswamy, L. K. (1996) High-temperature oxidation of zinc sulfide: kinetic modeling under conditions of strict kinetic control Industrial & Engineering Chemistry Research, 35 (9). pp. 3163-3170. ISSN 0888-5885
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ie960013e
Related URL: http://dx.doi.org/10.1021/ie960013e
Abstract
A detailed analysis of the oxidation of zinc sulfide particles was conducted in a thermobalance between 548 and 630°C with different oxygen concentrations. It was found that, in the presence of external mass-transfer effects, an oxysulfate intermediate was formed. However, when the flow rate was chosen such that this effect was eliminated, no sulfates were formed. Analysis of the controlling regimes indicated that even the use of small particles (<200 mesh) did not eliminate internal diffusional resistance. Thus, using only the initial rate data, the surface reaction model (-r = kKA[O2]/1 + KA[O2]) with no dissociation of oxygen was found to depict the data very well up to 609°C. Simple power law models were found to be wholly inadequate to represent the data.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 22899 |
| Deposited On: | 25 Nov 2010 13:53 |
| Last Modified: | 31 May 2011 05:35 |
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