Experimental study on mercury transformation and removal in coal-fired boiler flue gases

article This paper reported mercury speciation and emissions from five coal-fired power stations in China. The standard Ontario Hydro Method (OHM) was used into the flue gas mercury sampling before and after fabric filter (FF)/electrostatic precipitator (ESP) locations in these coal-fired power stations, and then various mercuryspeciationsuchasHg 0 ,Hg 2+ andHg P in fluegas,wasanalyzedbyusingEPAmethod.Thesolidsamples such as coal, bottom ash and ESP ash, were analyzed by DMA 80 based on EPA Method 7473. Through analysis the mercury speciation varied greatly when flue gas went through FF/ESP. Of the total mercury in flue gas, the concentration of Hg 2+

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