Abstract
The kinetics of gas hydrogen chloride removal with limestone was studied in a differential fixed-bed reactor. The reagent gas was a mixture that had a composition comparable to that of flue gas. The influence of certain parameters was investigated (exposure time, temperature and particle size). Temperatures in the range 300–600°C and particle sizes in the range 46.5–190 μm were studied with exposure times up to 2400 s. The experimental results obtained were interpreted by means of the grain model (porous particles) or the unreacted-core-shrinking model (less porous particles). The chemical kinetic constant and the solid diffusivity were calculated for both models at each temperature.
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