Abstract
Comparative data are reported on the sulphur dioxide reactivity of 12 Italian limestones, which are possible sorbents for large-scale fluidized-bed combustors. Physical characterization of the limestones was carried out using different techniques such as X-ray diffraction, i.r. spectrophotometry, N 2 adsorption and mercury porosimetry. SO 2 reactivity, as determined using a fixed bed quartz reactor ( T = 850 °C, SO 2 = 6200 ppm) ranged from 17 to 57 wt% CaO conversion. It has been proposed that the performance of desulphurization sorbents, through the dependence on the physical and chemical characteristics, can be forecast by a simple linear semi-empirical equation.
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