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Mercury emissions control by wet FGD systems: EPRI pilot-scale results

Technical Report ·
OSTI ID:121445
; ;  [1]
  1. Radian Corporation, Austin, TX (United States); and others
This paper presents results from pilot-scale tests that investigated mercury removal across wet limestone flue gas desulfurization (FGD) systems. The program was conducted at EPRIs Environmental Control Technology Center, located in Barker, NY. The test results showed that mercuric chloride (HgCl{sub 2}) was efficiently removed across the FGD system, while elemental mercury was not collected. The practical implication of this study is that although FGD systems efficiently remove some forms of mercury from flue gas, the overall mercury removal efficiency, and therefore the total mercury emissions from a coal-fired power plant equipped with an FGD system, will depend on the chemical form of the mercury in the flue gas. Unfortunately, no validated gas sampling method is available for speciating the different forms of mercury in flue gas. It is, therefore, difficult to predict mercury removal across FGD systems and to interpret any mercury removal data that have been collected.
Research Organization:
Electric Power Research Inst., Palo Alto, CA (United States)
OSTI ID:
121445
Report Number(s):
EPRI-TR--105258-Vol.3; CONF-950332--Vol.3
Country of Publication:
United States
Language:
English