Combined SO sub 2 /NO sub x control using ferrouster dot EDTA and a secondary additive in a lime-based aqueous scrubber system. [Sodium ascorbate]

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Integration of NO{sub x} control into existing flue-gas desulfurization (FGD) systems addresses site-specific control requirements while minimizing retrofit difficulties. Argonne has studied the use of the metal-chelate additives, such as ferrous{center dot}EDTA in various wet FGD chemistries, to promote combined SO{sub 2}/NO{sub x} scrubbing. A major process problem is oxidation of the iron to the ferric species, leading to a significant decrease in NO{sub x}-removal capability. Argonne discovered a class of organic compounds that, when used with ferrous{center dot}EDTA in a sodium carbonate chemistry, could maintain high levels of NO{sub x} removal. However, those antioxidant/reducing agents are not effective in ... continued below

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Mendelsohn, M.H.; Livengood, C.D. & Harkness, J.B.L. January 1, 1991.

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Integration of NO{sub x} control into existing flue-gas desulfurization (FGD) systems addresses site-specific control requirements while minimizing retrofit difficulties. Argonne has studied the use of the metal-chelate additives, such as ferrous{center dot}EDTA in various wet FGD chemistries, to promote combined SO{sub 2}/NO{sub x} scrubbing. A major process problem is oxidation of the iron to the ferric species, leading to a significant decrease in NO{sub x}-removal capability. Argonne discovered a class of organic compounds that, when used with ferrous{center dot}EDTA in a sodium carbonate chemistry, could maintain high levels of NO{sub x} removal. However, those antioxidant/reducing agents are not effective in a lime-based chemistry, and a broader investigation of antioxidants was initiated. This paper discusses results of that investigation, which found a practical antioxidant/reducing agent capable of maintaining NO{sub x} removals of about 50% (compared with about 15% without the agent) in a lime-based FGD chemistry with FE(II){center dot}EDTA. 5 refs., 10 figs.

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Pages: (15 p)

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OSTI; NTIS; GPO Dep.

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  • SO/sub 2/ control symposium, Washington, DC (United States), 3-6 Dec 1991

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  • Other: DE92003419
  • Report No.: ANL/CP-72760
  • Report No.: CONF-911226--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6025595
  • Archival Resource Key: ark:/67531/metadc1096927

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  • January 1, 1991

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  • Feb. 18, 2018, 3:59 p.m.

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  • April 17, 2018, 3:27 p.m.

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Mendelsohn, M.H.; Livengood, C.D. & Harkness, J.B.L. Combined SO sub 2 /NO sub x control using ferrouster dot EDTA and a secondary additive in a lime-based aqueous scrubber system. [Sodium ascorbate], article, January 1, 1991; Illinois. (digital.library.unt.edu/ark:/67531/metadc1096927/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.