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Single‐Pellet, moment method for analysis of gas‐solid reactions
Author(s) -
Doǧu Timur,
Keskin Aliye,
Doǧu GÜLsen,
Smith J. M.
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690320504
Subject(s) - pellet , thiele modulus , chemistry , tortuosity , diffusion , thermodynamics , moment (physics) , adsorption , porosity , reaction rate constant , analytical chemistry (journal) , materials science , kinetics , chromatography , composite material , organic chemistry , physics , quantum mechanics , classical mechanics
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 SO 2 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.