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In order to determine the intrinsic reactivity behavior from thermogravimetry studies, the experimental conditions should be such that the reactions are not mass transfer limited. Biomass char usually has a higher reactivity than coal chars. Therefore, mass transfer limitations may be more problematic when studying biomass char reactivity. Chemical reaction kinetics and mass transfer processes present...
In the present study, the potential for products other than CaCl 2 to be formed during HCl absorption was studied to shed light on the mechanisms of limestone chlorination. Experiments of different durations were made with a thermogravimetric apparatus, and the crystalline reaction products were identified by X-ray diffractometry (XRD). In the experiments, absorption products with Cl/Ca molar...
In the present work, the objective was to elaborate the chemistry of limestone and HCl in hot flue gases, especially under conditions that are typical of fluidised bed combustors. The effects of temperature, absorbent quality and particle size as well as gas atmosphere on the absorption reactions of HCl have been investigated, as have the products of chlorination. In addition, special emphasis was...
In this work, the simultaneous absorption of HCl and SO 2 with limestone was studied using thermogravimetry. The objective was to investigate the effects of the temperature and gas atmosphere on the absorption results. Special emphasis was placed on elucidating the formation of the molten phases while these gases were being absorbed. Partially reacted absorbent particles were examined using...
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