Investigation of modified speciation for enhanced control of mercury

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The control of hazardous air pollutant (HAP) emissions was addressed in Title III of the Clean Air Act Amendments of 1990, which provided an initial list of 189 elements and compounds of concern. The combustion of coal has the potential to produce a number of those species, either directly as a result of the trace elements found in coal, or as products of chemical reactions occurring in combustion. However, field studies conducted by the U.S. Department of Energy (DOE), the Electric Power Research Institute (EPRI), and others have shown that the actual emissions are very low and that effective particulate-matter ... continued below

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16 p.

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Livengood, C.D. & Mendelsohn, M.H. September 1, 1997.

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Description

The control of hazardous air pollutant (HAP) emissions was addressed in Title III of the Clean Air Act Amendments of 1990, which provided an initial list of 189 elements and compounds of concern. The combustion of coal has the potential to produce a number of those species, either directly as a result of the trace elements found in coal, or as products of chemical reactions occurring in combustion. However, field studies conducted by the U.S. Department of Energy (DOE), the Electric Power Research Institute (EPRI), and others have shown that the actual emissions are very low and that effective particulate-matter capture can control most of the inorganic species. The most significant exception is mercury, which has also been singled out for particular regulatory attention because of its behavior in the environment (bioaccumulation) and the potential for deleterious health effects. In anticipation of possible regulations regarding mercury emissions, research efforts sponsored by DOE, EPRI, and others are investigating the risks posed by mercury emissions, improved techniques for measuring those emissions, and possible control measures. The focus in the control research is on techniques that can be used in conjunction with existing flue-gas-cleanup (FGC) systems in order to minimize additional capital costs and operational complexity. The very small amount of mercury (on the order of a few micrograms per cubic meter) in flue gas, its occurrence in several chemical forms that vary from system to system, the very low solubility of the elemental form, and the fact that it is usually in the vapor phase combine to make the achievement of cost-effective control a challenging task.

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16 p.

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OSTI as DE97053932

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  • Advanced coal-based power and environmental systems `97 conference, Pittsburgh, PA (United States), 22-24 Jul 1997

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  • Other: DE97053932
  • Report No.: ANL/ES/CP--94026
  • Report No.: CONF-970772--
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/510368 | External Link
  • Office of Scientific & Technical Information Report Number: 561189
  • Archival Resource Key: ark:/67531/metadc698911

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 5:09 p.m.

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Livengood, C.D. & Mendelsohn, M.H. Investigation of modified speciation for enhanced control of mercury, article, September 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc698911/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.