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The two main gaseous mercury species in combustion flue gas are elemental mercury (Hg 0 ) and oxidized mercury (Hg 2+ ). In the coal combustion process using an installed wet FGD system, Hg 2+ is captured and Hg 0 emitted since Hg 2+ is soluble in water. Oxidation of Hg 0 upstream of the FGD would significantly reduce Hg emission. In the presence of...
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