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Gas-solid reactions: Experimental evaluation of the zone model

✍ Scribed by P.C. Prasannan; L.K. Doraiswamy

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
948 KB
Volume
37
Category
Article
ISSN
0009-2509

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✦ Synopsis

Zinc sulfide pellets sintered at 12OO"C, l000"C, 800"C and 600"C were partially oxidized in a single pellet reactor. Sulfur profiles of these samples were measured using Auger electron spectroscopy (AES) and electron probe microanalysis (EPMA). These profiles showed the coexistence of three zones: ash layer, reaction zone, and unreacted core. The zone thickness was found to be approximately the same for samples of comparable porosities. The effective diffusivities of sintered zinc sulfide pellets calculated by using the values of zone thickness measured in the present study compare well with the literature values reported from kinetic studies.

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