Abstract
Transient behaviour of the exothermic, irreversible silicon-nitrogen reaction has been simulated using a particle-pellet model which incorporates a sharp 'cut-of T reaction into the moving reaction zone in the heat mass transfer Held. Variations of certain physical parameters connected with the micro-structural changes during reaction, with respect to temperature and/or solid concentration are taken into account. The solution procedures to the resulting system or equations are based on an explicit finite difference scheme. Effects of the Thiele modulus and Biot number for heat transfer on the solid conversion and fluid concentration are examined, together with the effect of a zero heat of reaction on the temperature profiles in the compact. The results are graphically presented and interpreted.
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