Question: Spherical solid particles containing B are roasted isothermally in an oven with gas of constant composition. Solids are converted to a firm nonflaking product according

Spherical solid particles containing B are roasted isothermally in an oven with gas of constant composition. Solids are converted to a firm nonflaking product according to the SCM as follows:

From the following conversion data (by chemical analysis) or core size data (by slicing and measuring) determine the rate controlling mechanism for the transformation of solid. dp 1 1 XB 0.3 0.75 t, sec 2 25

A(g) + B(s) R(g) + S(s), CA = 0.01 kmol/m, PB 20 kmol/m

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