Abstract
Flue gas desulfurization (FGD) technologies are applied to minimize SO2 emission to the atmosphere and prevention of acid rains. Magnesium oxide (MgO) is one of the common sorbents to capture sulfur dioxide in FGD. Pore blockage and incomplete conversion are the main problems of sorbents such as CaO and MgO. In this study, acid-washed technique as a modification method was applied to enhance SO2 adsorption capacity of MgO. The tests were carried out in thermogravimeter (TG) and packed bed reactor to compare the performance of the acid-washed sorbents with the initial natural samples. The results showed that the acid-washed sorbents has more adsorption capacity than the natural samples. Finally, the single pellet conversion–time profiles and packed bed reactor breakthrough curves for both sorbents were predicted by random pore model (RPM) with fairly good agreements.
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