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Kinetic modeling of the reaction between hydrated lime and SO2 at low temperature

✍ Scribed by M. Bausach; M. Pera-Titus; C. Fité; F. Cunill; J.-F. Izquierdo; J. Tejero; M. Iborra

Publisher
American Institute of Chemical Engineers
Year
2005
Tongue
English
Weight
353 KB
Volume
51
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

The kinetics of the noncatalytic solid–gas reaction between Ca(OH)~2~ and SO~2~ at low temperature and in the presence of water vapor was investigated. The effect of relative humidity, temperature, and SO~2~ concentration on the desulfurization capacity of the solid was evaluated, as well as the effect of NO~2~ concentration. A deactivation model (DM) and a new version of this model, by implementing an inverse shrinking core model (DM‐ISCM) with an ionic solid‐state diffusion control, were fitted to experimental kinetic data. The proposed model showed the best agreement with the experimental results. A chemical mechanism for the reaction on the solid surface was also discussed. © 2005 American Institute of Chemical Engineers AIChE J, 2005

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