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Noncatalytic fluid-solid reaction in an agitated slurry of polydisperse particles

✍ Scribed by W.E. King Jr; W.S. Jones

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
554 KB
Volume
36
Category
Article
ISSN
0009-2509

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✦ Synopsis

A diffusion-reaction model is presented for describing noncatalytic fluid-solid reaction in an agitated slurry where the solid particles are polydisperse. The model equations consist of a composite of subsystems each described by a distinct Thiele modulus and collectively coupled through the bulk phase fluid-reactant concentration. The total solid conversion in the slurry is represented by an integral containing an appropriate analytic form for describing the particle size distribution. Numerical examples using the Gates-Gaudin-Schuhmann form for cumulative weight distribution demonstrate a significant effect of the particle size distribution on conversion. An application of the model is presented using experimental global rate data for the pyritic desulfurization of coal with dissolved oxygen in aqueous slurry. The results of the analysis substantiate the diffusion-reaction model for -100 mesh Illinois #6 coal at temperatures less than 13oOC and oxygen pressures less than 300 psi. tNTRODUCTtON

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