ADVANTAGES

The major source of SO2in the US are coal burning electric powerplants. The typical SO2 content of the emissions is about 0.1% SO2or 1000 ppm. Low concentration of SO2 in gas stream makes itunprofitable for recovery as H2SO4. The most widely usedmethod is scrubbing. The installation and operation of these air pollutioncontrol device is expensive and require large capital expenditure.

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