Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions

Zhao, Yongxin; Mann, Michael D; Olson, Edwin S; Pavlish, John H; Dunham, Grant E

doi:10.1080/10473289.2006.10464483

Title: Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions

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Abstract

This paper is particularly related to elemental mercury (Hg{sup 0}) oxidation and divalent mercury (Hg{sup 2+} reduction under simulated flue gas conditions in the presence of nitric oxide (NO) and sulfur dioxide (SO{sub 2}). As a powerful oxidant and chlorinating reagent, Cl{sub 2} has the potential for Hg oxidation. However, the detailed mechanism for the interactions, especially among chlorine (Cl)-containing species, SO{sub 2}, NO, as well as H{sub 2}O, remains ambiguous. Research described in this paper therefore focused on the impacts of SO{sub 2} and NO on Hg{sup 0} oxidation and Hg{sup 2+} reduction with the intent of unraveling unrecognized interactions among Cl species, SO{sub 2}, and NO most importantly in the presence of H{sub 2}O. The experimental results demonstrated that SO{sub 2} and NO had pronounced inhibitory effects on Hg{sup 0} oxidation at high temperatures when H{sub 2}O was also present in the gas blend. Such a demonstration was further confirmed by the reduction of Hg{sup 2+} back into its elemental form. Data revealed that SO{sub 2} and NO were capable of promoting homogeneous reduction of Hg{sup 2+} to Hg{sup 0} with H{sub 2}O being present. However, the above inhibition or promotion disappeared under homogeneous conditions when H{sub 2}Omore »« less

Authors:

Zhao, Yongxin; Mann, Michael D; Olson, Edwin S; Pavlish, John H; Dunham, Grant E ^[1]

University of North Dakota, Grand Forks, ND (United States). Department of Chemical Engineering

Publication Date:: Mon May 15 00:00:00 EDT 2006

OSTI Identifier:: 20752299

Resource Type:: Journal Article

Journal Name:: Journal of the Air and Waste Management Association

Additional Journal Information:: Other Information: mikemann@mail.und.nodak.edu; Journal ID: ISSN 1047-3289

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; SULFUR DIOXIDE; NITRIC OXIDE; MERCURY; OXIDATION; REDUCTION; AIR POLLUTION CONTROL; FLUE GAS; CHEMICAL REACTIONS; CHLORINE; MERCURY CHLORIDES

Citation Formats


                    Zhao, Yongxin, Mann, Michael D, Olson, Edwin S, Pavlish, John H, and Dunham, Grant E. Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions.  United States: N. p., 2006. 
        Web.  doi:10.1080/10473289.2006.10464483.

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                    Zhao, Yongxin, Mann, Michael D, Olson, Edwin S, Pavlish, John H, & Dunham, Grant E. Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions.  United States.  https://doi.org/10.1080/10473289.2006.10464483

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                    Zhao, Yongxin, Mann, Michael D, Olson, Edwin S, Pavlish, John H, and Dunham, Grant E. 2006.  
        "Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions".  United States.  https://doi.org/10.1080/10473289.2006.10464483.

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@article{osti_20752299,

  title        = {Effects of sulfur dioxide and nitric oxide on mercury oxidation and reduction under homogeneous conditions},

  author       = {Zhao, Yongxin and Mann, Michael D and Olson, Edwin S and Pavlish, John H and Dunham, Grant E},

  abstractNote = {This paper is particularly related to elemental mercury (Hg{sup 0}) oxidation and divalent mercury (Hg{sup 2+} reduction under simulated flue gas conditions in the presence of nitric oxide (NO) and sulfur dioxide (SO{sub 2}). As a powerful oxidant and chlorinating reagent, Cl{sub 2} has the potential for Hg oxidation. However, the detailed mechanism for the interactions, especially among chlorine (Cl)-containing species, SO{sub 2}, NO, as well as H{sub 2}O, remains ambiguous. Research described in this paper therefore focused on the impacts of SO{sub 2} and NO on Hg{sup 0} oxidation and Hg{sup 2+} reduction with the intent of unraveling unrecognized interactions among Cl species, SO{sub 2}, and NO most importantly in the presence of H{sub 2}O. The experimental results demonstrated that SO{sub 2} and NO had pronounced inhibitory effects on Hg{sup 0} oxidation at high temperatures when H{sub 2}O was also present in the gas blend. Such a demonstration was further confirmed by the reduction of Hg{sup 2+} back into its elemental form. Data revealed that SO{sub 2} and NO were capable of promoting homogeneous reduction of Hg{sup 2+} to Hg{sup 0} with H{sub 2}O being present. However, the above inhibition or promotion disappeared under homogeneous conditions when H{sub 2}O was removed from the gas blend. 23 refs., 8 figs.},

  doi          = {10.1080/10473289.2006.10464483},

  url          = {https://www.osti.gov/biblio/20752299},
  journal      = {Journal of the Air and Waste Management Association},

  issn         = {1047-3289},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon May 15 00:00:00 EDT 2006},

  month        = {Mon May 15 00:00:00 EDT 2006}

}

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