A single‐pellet, moment technique is presented for evaluating reaction rate constants, effective diffusivities, and adsorption equilibrium constants for gas‐solid noncatalytic reactions. Experimental pulse‐response data for the reaction of SO2 with activated soda at 473 K were obtained to illustrate the method. The results show that intraparticle diffusion is the controlling mechanism for this reaction. The value of the Thiele modulus for axial transport was found to be 8.6 for a cylindrical pellet of porosity 0.56, tortuosity 2.3, and length 3 × 10−2 m.
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Doğu et al. (1986) studied this question.
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