Mercury Speciation in Flue Gases after an Oxidative Acid Wet Scrubber

2007 ◽  
Vol 30 (1) ◽  
pp. 131-138 ◽  
Author(s):  
C.-J. Löthgren ◽  
M. Takaoka ◽  
S. Andersson ◽  
B. Allard ◽  
J. Korell
Keyword(s):  
Mercury Speciation ◽  
Flue Gases ◽  
Wet Scrubber

A robust framework to predict mercury speciation in combustion flue gases

2014 ◽  
Vol 264 ◽  
pp. 380-385 ◽  
Author(s):  
Jonathan L. Ticknor ◽  
Heileen Hsu-Kim ◽  
Marc A. Deshusses
Keyword(s):  
Mercury Speciation ◽  
Flue Gases ◽  
Robust Framework

Combined Homo- and Heterogeneous Model for Mercury Speciation in Pulverized Fuel Combustion Flue Gases

2008 ◽  
Vol 22 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Shishir P. Sable ◽  
Wiebren de Jong ◽  
Hartmut Spliethoff
Keyword(s):  
Fuel Combustion ◽  
Mercury Speciation ◽  
Flue Gases ◽  
Heterogeneous Model ◽  
Pulverized Fuel

Mercury Speciation in Coal Combustion and Gasification Flue Gases

1996 ◽  
Vol 30 (8) ◽  
pp. 2421-2426 ◽  
Author(s):  
Kevin C. Galbreath ◽  
Christopher J. Zygarlicke
Keyword(s):  
Coal Combustion ◽  
Mercury Speciation ◽  
Flue Gases

Experimental Study of Factors Affecting Mercury Speciation in Coal-fired Flue Gases

2007 ◽  
pp. 700-704 ◽  
Author(s):  
Hong-liang Gao ◽  
Jijing Li ◽  
Jin-song Zhou ◽  
Zhong-yang Luo ◽  
Kefa Cen
Keyword(s):  
Experimental Study ◽  
Mercury Speciation ◽  
Flue Gases ◽  
Factors Affecting

Modeling mercury speciation in combustion flue gases using support vector machine: Prediction and evaluation

2010 ◽  
Vol 174 (1-3) ◽  
pp. 244-250 ◽  
Author(s):  
Bingtao Zhao ◽  
Zhongxiao Zhang ◽  
Jing Jin ◽  
Wei-Ping Pan
Keyword(s):  
Support Vector Machine ◽  
Mercury Speciation ◽  
Flue Gases ◽  
Support Vector

scholarly journals Mercury transformation and speciation in flue gases from anthropogenic emission sources: a critical review

2015 ◽  
Vol 15 (22) ◽  
pp. 32889-32929 ◽  
Author(s):  
L. Zhang ◽  
S. X. Wang ◽  
Q. R. Wu ◽  
F. Y. Wang ◽  
C.-J. Lin ◽  
...  
Keyword(s):  
Fly Ash ◽  
Biomass Burning ◽  
Ferrous Metal ◽  
Mercury Speciation ◽  
Flue Gases ◽  
Mercury Removal ◽  
Mercury Oxidation ◽  
Heterogeneous Oxidation ◽  
Iron And Steel ◽  
Transformation Mechanisms

Abstract. Mercury transformation mechanisms and speciation profiles are reviewed for mercury formed in and released from flue gases of coal-fired boilers, non-ferrous metal smelters, cement plants, iron and steel plants, municipal solid waste incinerators, and biomass burning. Mercury in coal, ores and other raw materials is released to flue gases in the form of Hg0 during combustion or smelting in boilers, kilns or furnaces. Decreasing temperature from over 800 °C to below 300 °C in flue gases leaving boilers, kilns or furnaces promotes homogeneous and heterogeneous oxidation of gaseous elemental mercury (Hg0) to gaseous divalent mercury (Hg2+), with a portion of Hg2+ adsorbed onto fly ash to form particulate-bound mercury (Hgp). Halogen is the primary oxidizer for Hg0 in flue gases, and active components (e.g.,TiO2, Fe2O3, etc.) on fly ash promote heterogeneous oxidation and adsorption processes. In addition to mercury removal, mercury transformation also occurs when passing through air pollution control devices (APCDs), affecting the mercury speciation in flue gases. In coal-fired power plants, selective catalytic reduction (SCR) system promotes mercury oxidation by 34–85 %, electrostatic precipitator (ESP) and fabric filter (FF) remove over 99 % of Hgp, and wet flue gas desulfurization system (WFGD) captures 60–95 % of Hg2+. In non-ferrous metal smelters, most Hg0 is converted to Hg2+ and removed in acid plants (APs). For cement clinker production, mercury cycling and operational conditions promote heterogeneous mercury oxidation and adsorption. The mercury speciation profiles in flue gases emitted to the atmosphere are determined by transformation mechanisms and mercury removal efficiencies by various APCDs. For all the sectors reviewed in this study, Hgp accounts for less than 5 % in flue gases. In China, mercury emission has a higher fraction (66–82 % of total mercury) in flue gases from coal combustion, in contrast to a greater Hg2+ fraction (29–90 %) from non-ferrous metal smelting, cement and iron/steel production. The higher Hg2+ fractions shown here than previous estimates may imply stronger local environmental impacts than previously thought, caused by mercury emissions in East Asia. Future research should focus on determining mercury speciation in flue gases from iron and steel plants, waste incineration and biomass burning, and on elucidating the mechanisms of mercury oxidation and adsorption in flue gases.

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