Abstract |
A research program was undertaken to investigate a selected set of calcined and uncalcined carbonate rock samples by electron paramagnetic resonance (EPR) spectroscopy in order to assist in the characterization of marls and chalks to identify properties which account for their high reactivity with SO2, establish a semi-quantitative basis for evaluating a crystalline order of limestones to predict their reactivity with acid gases, investigate the effect of altering the calcination temperature on the crystalline structure of calcines in order to identify those properties which account for the varying reactivity and deadburning, and investigate the effects of slaking on the crystalline parameters of calcines produced at different temperatures in order to support wet limestone scrubbing process development using manganese ions as a probe of calcium carbonate crystallinity, the fitting of manganese EPR line width data to the SO2 reactivity and capacity data resulted in correlation coefficients of r = 0.55 and 4 = 0.49 respectively. No significant EPR linewidth correlation was found for the reactivity and capacity of calcined materials. (Author) |