An interpretation of flue-gas mercury speciation data from a kinetic point of view☆

Wang, Jinsheng; Clements, Bruce; Zanganeh, Kourosh E.

doi:10.1016/s0016-2361(02)00399-x

Cited by 23 publications

(16 citation statements)

References 19 publications

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“…The Hg 2+ is a local pollutant, which is water-soluble and can fall from the atmosphere quickly. 10,11 However, the Hg 0 is a global pollutant, which is low water solubility with high vapor pressure and can present 3 to 24 months of residence time in environment atmosphere with a wide dispersion range. [12][13][14] Therefore, the emission control of Hg 0 is harder than that of Hg 2+ and it becomes the main concern for Hg pollution control.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Atmosphere on Elemental Mercury Release During Thermal Treatment of Two Bituminous Coals

Gao

Guo

Wei

2016

Journal of the Brazilian Chemical Society

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The dynamic release behavior of elemental Hg (Hg 0 ) during thermal treatment of two bituminous coals was studied under N 2 , CO 2 and air atmospheres. The results show that the profiles of Hg 0 released present several peaks during thermal treatment of two bituminous coals. The Hg peak profiles for the same coal are different with the different atmosphere used. The amount of Hg 0 released from the coals is about 92-94, 73-74 and 31-33% under N 2 , CO 2 and air atmosphere, respectively. This indicates that the Hg 0 is the dominant form during thermal treatment of the coals under N 2 atmosphere whereas part of Hg 0 is converted into the oxidized Hg during thermal treatment of the coals under CO 2 and air atmosphere. The total Hg released is promoted by the volatile matter release to some extent while the Hg 0 released is mainly affected by the atmospheres used.

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Section: Introductionmentioning

confidence: 99%

The Effect of Atmosphere on Elemental Mercury Release During Thermal Treatment of Two Bituminous Coals

Gao

Guo

Wei

2016

Journal of the Brazilian Chemical Society

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“…Mercury speciation in flue gases is of great importance as the metallic mercury vapor form Hg 0 is insoluble in water and is difficult to capture, while its oxidized form Hg 2C is soluble and can be removed by conventional flue gas desulphurization solutions (Wang et al, 2003). Furthermore, the importance of mercury speciation is associated with the assessment of toxicity, mobility including bioaccumulation and transport of mercury because each form has distinctive physical, chemical, and biological properties (Galbreath and Zygarlicke, 1996).…”

Section: Resultsmentioning

confidence: 99%

The Effect of Reducing Conditions and Temperature on Mercury Release from Coal

Strezov

Evans²,

Ziółkowski

et al. 2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Coals contain small quantities of mercury that have the potential to be emitted to the atmosphere during thermal processing. While significant research effort has improved knowledge of mercury emissions from direct combustion of coal in power stations to produce electricity, much less effort has been devoted to mercury behavior from coal under reducing conditions, typical for smelting and metal processing. This article discusses laboratory investigations of mercury release from coal during heating under reducing conditions. Two coals, one of Australian and one of United States origin, were subjected to thermal treatment to temperatures ranging between 100 and 800 ı C. The level of mercury was monitored using cold-vapor atomic fluorescence spectrometry. The largest fraction of mercury was released at temperatures of up to 500 ı C, however some strongly bonded mercury was retained in coal samples even at temperatures of 600 ı C. Reducing atmospheric conditions revealed a likely delay to higher temperatures in the release of mercury from coal. Speciation of mercury in coal was further determined with a six-stage sequential selective extraction method. Mercury reaction mechanisms occurring during the heating of coal under both reducing and oxidizing conditions relevant to direct ironmaking processes are discussed.

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“…The effect of HCl is due to the formation of active chlorine [7,11,[21][22][23][24]: CuO x may be a good catalyst for the formation of chlorine [19,24]. The catalytic effect is presumed to proceed through the following reaction:…”

Section: Effect Of Hcl Concentrationmentioning

confidence: 99%

“…Since chlorine is present in coal, Hg 2+ may also exist as HgCl 2 in the coal-fired flue gas. The proportion of Hg 2+ and Hg P is determined by a variety of factors including the flue gas component [7,8], the chlorine content in the coal [9,10], the flue gas temperature [11], the existing air pollution control devices (APCD) in the power plants [12][13][14], etc. Hg 2+ and Hg P can be removed from the flue gas by existing APCDs, such as wet flue gas desulfurization (WFGD) and electrostatic precipitator (ESP).…”

Section: Introductionmentioning

confidence: 99%

Performance of CuOx–neutral Al2O3 sorbents on mercury removal from simulated coal combustion flue gas

Yin

Zhuo

et al. 2015

Fuel Processing Technology

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An interpretation of flue-gas mercury speciation data from a kinetic point of view☆

Cited by 23 publications

References 19 publications

The Effect of Atmosphere on Elemental Mercury Release During Thermal Treatment of Two Bituminous Coals

The Effect of Atmosphere on Elemental Mercury Release During Thermal Treatment of Two Bituminous Coals

The Effect of Reducing Conditions and Temperature on Mercury Release from Coal

Performance of CuOx–neutral Al2O3 sorbents on mercury removal from simulated coal combustion flue gas

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