수화된 백운석을 이용한 SO2의 건식 제거

초록

Domestic dolomite sorbents for the SO2 removal were prepared and the characteristics of sorbents were investigated by TGA, XRD, SEM and BET. To improve SO2 capture capacity, the dolomite sorbents were calcined, hydrated and recalcined at various conditions. The specific surface area of hydrated sorbents increased with increasing stirring rate, hydration temperature and hydration time. In this work, the hydration process by using ultrasonic wave was conducted at the hydration temperature of 100 oC for the hydration time of 100-120 min. The specific surface area of sorbent hydrated at the above condition, was increased by 25%, compared to that of unhydrated sorbent and the hydrated sorbent exhibited SO2 removal capacity of 16 times higher than unhydrated sorbent. The effect of particle size for the sulfidation was examined. As a result, the highest SO2 removal capacity could be achieved at the particle size of 32-60 µm. The SO2 removal capacity of sorbent below 32 µm decreased due to sintering at about 850 oC.

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