Dynamic analysis of changes in diffusion and sorption parameters in the reaction of SO2with activated soda ash

Doǧu, Gülsen
Keskin, Alne
Doǧu, Timur
Variations in pore structure cause significant changes in diffusion resistance and adsorption characteristics during the reaction of SO2 with activated soda. Breakthrough and moment analysis of the SO2‐activated soda ash reaction showed that the effective diffusion coefficient of SO2 in the solid product (mostly Na2SO3) was about three times smaller than its value in the original activated soda. About 30% of the diffusion flux of SO2 in the solid product was found to be due to surface diffusion. The adsorption equilibrium constant of SO2 on the solid product was found to be about half the value of the adsorption equilibrium constant on activated soda. It was also determined that SO2 was irreversibly adsorbed on the solid product Na2SO3 at 200°C and 3.7 atm. The gaseous product CO2 was not adsorbed on the solid product while it was slightly adsorbed on activated soda.
The Canadian Journal of Chemical Engineering


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Citation Formats
G. Doǧu, A. Keskin, and T. Doǧu, “Dynamic analysis of changes in diffusion and sorption parameters in the reaction of SO2with activated soda ash,” The Canadian Journal of Chemical Engineering, pp. 605–610, 1988, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51905.