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Received July 17, 2008
Accepted October 15, 2008
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Multi-method mercury specification from lignite-fired power plants
School of Power Engineering, Nanjing Normal University, Nanjing 210042, China 1School of Energy & Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090, China 2ICSET, Western Kentucky University, Bowling Green, KY 42101, USA
luping@njnu.edu.cn
Korean Journal of Chemical Engineering, March 2009, 26(2), 542-547(6), 10.1007/s11814-009-0092-z
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Abstract
Mercury concentration and speciation partitioning, including total mercury, elemental mercury and oxidized mercury from a lignite-fired power plant under different operating conditions, was studied by Ontario hydro method (OHM), two kinds of continuous mercury monitors (semi-continuous emission monitor (SCEM) and continuous mercury monitor (CMM)), and the sorbent trap method. The effects of boiler load, fuel blending ratio, electrostatic precipitator, flue gas desulphurization, flue gas bypassing the FGD ratio, and mercury measuring methods on mercury_x000D_
emission were analyzed. The results indicated that mercury data from OHM, SCEM and CMM presented a good consistency throughout the entire testing period within ±20% acceptable range; however, the results from Appendix K provided bigger discrepancies than the results of OHM and SCEM due to the interferences of higher selenium content in the flue gas. The particulate-bound mercury removal efficiencies of ESP were determined to be 16-35%. The percentages of elemental mercury emitted from two lignite-fired power plants were in the higher ranges of 43.9-74.2%.
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