Heterogeneous oxidation of mercury in simulated post combustion conditions

Norton, G.A.; Yang, Hongqun; Brown, Robert C.; Laudal, D.L.; Dunham, Grant E.; Erjavec, John

doi:10.1016/s0016-2361(02)00254-5

Cited by 120 publications

(91 citation statements)

References 7 publications

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“…However other studies have shown that it is the combination of fly ash + NO 2 +HCl + SO 2 that gives rise to the highest levels of Hg oxidation [13]. The influence of chlorine and fly ash particles on oxidation is borne out by several studies [5,23] while the role of unburned carbon as the main component responsible for the enhancement of Hg oxidation and capture has also been confirmed [24].…”

Section: Because the Different Modes Of Occurrence Of Hg Involve Diffmentioning

confidence: 93%

“…Several full-, pilot-, and bench-scale studies have revealed that fly ashes can both adsorb and oxidize Hg in coal combustion flue gases [6][7][8][9][10][11][12][13][14]. A number of investigations have attempted to correlate Hg retention and oxidation with the content and characteristics of unburned carbon in raw fly ashes [15][16][17] and have found that, in general, Hg capture increases in fly ashes with a high carbon content [18].…”

Section: Because the Different Modes Of Occurrence Of Hg Involve Diffmentioning

confidence: 99%

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The role of unburned carbon concentrates from fly ashes in the oxidation and retention of mercury

Abad-Valle

López-Antón

Dı́az-Somoano

et al. 2011

Chemical Engineering Journal

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Section: Because the Different Modes Of Occurrence Of Hg Involve Diffmentioning

confidence: 93%

Section: Because the Different Modes Of Occurrence Of Hg Involve Diffmentioning

confidence: 99%

The role of unburned carbon concentrates from fly ashes in the oxidation and retention of mercury

Abad-Valle

López-Antón

Dı́az-Somoano

et al. 2011

Chemical Engineering Journal

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“…The effi ciency of heterogeneous reactions taking place on the surface of fl y ash also depends on the fl ue gas composition, and particularly on the concentration of NO 2 , HCl, NO, and SO 2 (Norton et al 2003, Hower et al 2010, Fuente-Cuesta et a. 2012.…”

Section: Heterogeneous Reactionsmentioning

confidence: 99%

Transformations of mercury in processes of solid fuel combustion – review

Czaplicka¹,

Pyta²

2017

Archives of Environmental Protection

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Abstract:The paper presents current reports on kinetics and mechanisms of reactions with mercury which take place in the exhaust gases, discharged from the processes of combustion of solid fuels (coals). The three main stages were considered. The fi rst one, when thermal decomposition of Hg components takes place together with formation of elemental mercury (Hg 0 ). The second one with homogeneous oxidation of Hg 0 to Hg 2+ by other active components of exhaust gases (e.g. HCl). The third one with heterogeneous reactions of gaseous mercury (the both -elemental and oxidised Hg) and solid particles of fl y ash, leading to generation of particulate-bound mercury (Hg p ). Infl uence of exhaust components and their concentrations, temperature and retention time on the effi ciency of mercury oxidation was determined. The issues concerning physical (gas-solid) and chemical speciation of mercury (fractionation Hg 0 -Hg 2+ ) as well as factors which have infl uence on the mercury speciation in exhaust gases are discussed in detail.

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“…28 In the presence of fly ash, NO 2 was found to increase the oxidation rate, while NO inhibited oxidation in most cases. 29 …”

Section: Homogeneous Oxidationmentioning

confidence: 99%

Modeling the Impact of Elevated Mercury in Defense Waste Processing Facility Melter Feed on the Melter Off-Gas System-Preliminary Report

Zamecnik¹,

Choi²

2010

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Heterogeneous oxidation of mercury in simulated post combustion conditions

Cited by 120 publications

References 7 publications

The role of unburned carbon concentrates from fly ashes in the oxidation and retention of mercury

The role of unburned carbon concentrates from fly ashes in the oxidation and retention of mercury

Transformations of mercury in processes of solid fuel combustion – review

Modeling the Impact of Elevated Mercury in Defense Waste Processing Facility Melter Feed on the Melter Off-Gas System-Preliminary Report

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