KINETICS OF THE THERMAL DECOMPOSITION OF HYDRATED DOLOMITIC LIME AND SINTERING OF NASCENT CALCINE |
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Authors: | M. Hartman O. Trnka Z. Beran |
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Affiliation: | a Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Prague, Czech Republicb Department of Food Chemistry and Biotechnology, Faculty of Chemistry, Technical University, Brno, Czech Republic |
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Abstract: | A study is reported of the controlled thermal decomposition of hydrated dolomitic lime originated from a high-grade dolomite. Both increasing and constant temperature weight-loss methods have been employed to measure the rate of thermal dehydration of hydrated dolomitic lime at 305-400°C. The amassed data have been correlated with the use of an Arrhenius-type rate equation. Changes in the specific surface area of calcines due to sintering phenomena have also been studied at 400-600°C. An empirical, fractional-order kinetic relationship has been developed for surface area reduction as a function of temperature and elapsed time of sintering. Presented findings make it possible to specify the operation conditions needed for the preparation of reactive dolomite-derived sorbents. |
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Keywords: | Thermal decomposition hydrated dolomitic lime sintering and specific surface area nascent dolomitic calcine sorbent for acidic gaseous pollutants |
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