Significance of Fe2O3 modified SCR catalyst for gas-phase elemental mercury oxidation in coal-fired flue gas

2016 ◽  
Vol 149 ◽  
pp. 23-28 ◽  
Author(s):  
Wen-Jun Huang ◽  
Hao-Miao Xu ◽  
Zan Qu ◽  
Song-Jian Zhao ◽  
Wan-Miao Chen ◽  
...  
Keyword(s):  
Gas Phase ◽  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Scr Catalyst

Significance of RuO2Modified SCR Catalyst for Elemental Mercury Oxidation in Coal-fired Flue Gas

2011 ◽  
Vol 45 (13) ◽  
pp. 5725-5730 ◽  
Author(s):  
Naiqiang Yan ◽  
Wanmiao Chen ◽  
Jie Chen ◽  
Zan Qu ◽  
Yongfu Guo ◽  
...  
Keyword(s):  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Scr Catalyst

Oxidation of Elemental Mercury with Non-Thermal Plasma Coupled with Photocatalyst

2012 ◽  
Vol 15 (2) ◽  
Author(s):  
Hongmin Yang ◽  
Wenhui Hou ◽  
Hairu Zhang ◽  
Leiyu Zhou
Keyword(s):  
Gas Phase ◽  
Flue Gas ◽  
Thermal Plasma ◽  
Elemental Mercury ◽  
Mercury Species ◽  
Non Thermal Plasma

AbstractA promising approach has been developed to oxidize and remove elemental mercury species from coal-fired flue gas. The oxidation of gas-phase elemental mercury (Hg

Mechanism and Kinetic Study on Elemental Mercury Oxidation in Flue Gas by Ozone Injection

2017 ◽  
Vol 40 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Zhengcheng Wen ◽  
Zhihua Wang ◽  
Yuan Li ◽  
Kefa Cen
Keyword(s):  
Kinetic Study ◽  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Ozone Injection

Effect of flue gas component and ash composition on elemental mercury oxidation/adsorption by NH4Br modified fly ash

2018 ◽  
Vol 345 ◽  
pp. 578-585 ◽  
Author(s):  
Qiang Zhou ◽  
Yufeng Duan ◽  
Mingming Chen ◽  
Meng Liu ◽  
Ping Lu ◽  
...  
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Ash Composition ◽  
Gas Component ◽  
Modified Fly Ash

A Two-Phase Box Model to Study Mercury Atmospheric Mechanisms

2005 ◽  
Vol 2 (3) ◽  
pp. 205 ◽  
Author(s):  
Li Pan ◽  
Gregory R. Carmichael
Keyword(s):  
Gas Phase ◽  
Aqueous Phase ◽  
Wet Deposition ◽  
Elemental Mercury ◽  
Box Model ◽  
Water Droplets ◽  
Mercury Oxidation ◽  
Two Phase ◽  
Potential Health ◽  
Chemical Mechanisms

Environmental Context. Elemental mercury (Hg0) is converted to divalent mercury (Hg2+) in the atmosphere, largely in water droplets. The wet deposition of Hg2+ is a major concern to human health. Because it is bio-accumulated through the food chain, consumption of contaminated fish can be particularly dangerous. Currently the budgets of mercury in the atmosphere are poorly understood, due in part to uncertainties in the chemical pathways controlling the speciated forms of mercury. Improved mercury chemistry models are needed to better predict Hg2+ levels in water droplets and to estimate wet deposition of Hg2+ in order to help assess the potential health risks of mercury. Abstract. A box model designed to investigate mercury chemical mechanisms in the atmosphere is presented. Aqueous-phase mercury oxidation–reduction, sulfite, and oxygen reactions, along with gas-phase mercury reactions are included in the model. The model is used to evaluate the key reaction steps under several atmospheric conditions. The sensitivity of the results to parameters, initial conditions, and assumptions regarding chemical mechanisms are investigated. Model simulations were performed in closed (liquid only) and two-phase (liquid/gas) systems. In the liquid phase, elemental mercury is oxidized to divalent mercury by ozone at night and by hydroxide radical and ozone during the day. Ozone is shown to play a significant role in mercury mechanisms by oxidizing elemental mercury directly and producing hydroxyl and hydroperoxyl radicals. The effects of sulfite on mercury aqueous chemistry were found to be limited due to its rapid conversion to sulfate. The results of two-phase simulations show that Hg2+ concentrations exhibit a diurnal cycle, increasing before the sunrise and decreasing before the sunset due to the aqueous-phase hydrogen–oxygen photochemistry that produces hydroxyl and hydroperoxyl radicals. Gas-phase mercury oxidation reactions significantly enhance the levels of Hg2+ in the aqueous phase, and reactions with ozone and hydroxyl radicals play the leading role. The effect of reactive chlorine on mercury chemistry can be important.

A systematic review on the efficiency of cerium-impregnated activated carbons for the removal of gas-phase, elemental mercury from flue gas

2017 ◽  
Vol 24 (13) ◽  
pp. 12092-12103 ◽  
Author(s):  
Mohammad Hossein Sowlat ◽  
Babak Kakavandi ◽  
Saeedeh Lotfi ◽  
Masud Yunesian ◽  
Mohammad Abdollahi ◽  
...  
Keyword(s):  
Systematic Review ◽  
Gas Phase ◽  
Flue Gas ◽  
Activated Carbons ◽  
Elemental Mercury

Effects of Reaction Conditions on Elemental Mercury Oxidation in Simulated Flue Gas by DC Nonthermal Plasma

2011 ◽  
Vol 50 (10) ◽  
pp. 5914-5919 ◽  
Author(s):  
Meiyan Wang ◽  
Tianle Zhu ◽  
Hongjing Luo ◽  
Hong Wang ◽  
Weiyi Fan
Keyword(s):  
Flue Gas ◽  
Nonthermal Plasma ◽  
Elemental Mercury ◽  
Reaction Conditions ◽  
Mercury Oxidation
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