Abstract
In general, the decomposition of CaSO4 formed by sulfation reaction in the in-furnace desulfurization process using limestone has strong effect on the desulfurization reaction under the oxy-fuel combustion condition. In this study, the conversion rates were measured and reaction rates were calculated in order to investigate the effects of the experimental variables such as temperature and the concentrations of CO2, O2, SO2, on the CaSO4 decomposition reaction using DTF (Drop Tube Furnace) in the desulfurization reaction. The conversion rate and the reaction rate of CaSO4 decomposition reaction were increased with reaction temperature. CO2 concentration has little effect on CaSO4 decomposition reaction in the presence of O2. Under the same experimental conditions, the decomposition rate of CaSO4 was enhanced with the decreasing the O2 concentration, but vice versa with the increasing of SO2 concentration.
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