Gas-phase elemental mercury removal from flue gas by cobalt-modified fly ash at low temperatures

2014 ◽  
Vol 35 (22) ◽  
pp. 2870-2877 ◽  
Author(s):  
Yalin Xu ◽  
Qin Zhong ◽  
Lili Xing
Keyword(s):  
Fly Ash ◽  
Gas Phase ◽  
Flue Gas ◽  
Low Temperatures ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Modified Fly Ash

Experimental Study on the Spray of Mercury Removal Performance of Flue Gas Desulfurization Wastewater

2013 ◽  
Vol 807-809 ◽  
pp. 1483-1488
Author(s):  
Si Wei Pan ◽  
Nian Tang ◽  
Jiang Jun Hu ◽  
Ji Fu Kuang ◽  
Min Qi ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Flue Gas ◽  
Cost Savings ◽  
Chloride Ion ◽  
Elemental Mercury ◽  
Flue Gas Desulfurization ◽  
Mercury Removal ◽  
Modified Fly Ash ◽  
Desulfurization Wastewater

For coal-fired power plant boiler flue gas desulfurization wastewater’s actual spraying proposed combination bag house dust while mercury removal process. Experimental study of the coal-fired boiler flue gas spraying chlorine ions and other halogens desulfurization wastewater modified fly ash flue gas mercury performance. Studies showed that desulfurization wastewater fly ash on chloride ion enhanced oxidation of elemental mercury, with the increase in the amount sprayed desulfurization wastewater, flue gas mercury capacity increased. Desulfurization wastewater add another halogen element can promote flue gas mercury performance, the effect of iodine was the most significant, followed by bromine. The desulfurization wastewater as a modified liquid sprayed into the flue modified fly ash, fly ash can improve mercury removal performance, eliminate the need for desulfurization wastewater treatment, cost savings, achieve desulfurization wastewater recycling.

Experimental Research on Fly Ash Modified Adsorption of Mercury Removal Efficiency of Flue Gas

2013 ◽  
Vol 800 ◽  
pp. 132-138 ◽  
Author(s):  
Li Li ◽  
Si Wei Pan ◽  
Jiang Jun Hu ◽  
Ji Fu Kuang ◽  
Min Qi ◽  
...  
Keyword(s):  
Fly Ash ◽  
Removal Efficiency ◽  
Flue Gas ◽  
Power Plants ◽  
Physical Adsorption ◽  
Adsorption Properties ◽  
Mercury Removal ◽  
Immersion Method ◽  
Adsorption Temperature ◽  
Modified Fly Ash

Mercury in the flue gas in coal-fired power plant as the research object using halogen compound as the modified material, the fly ash was modified by chemical immersion method，Study on adsorption agent, the adsorption temperature, modified material and loading on mercury adsorption of flue gas in coal-fired power plants. Experiments showed that, iodine adsorption properties of modified fly ash was the most significant, with the increase of the sorbent dosage, Hg removal efficiency increased, fly ash adsorption amount of change was not obvious, between 80-140°C temperature range, fly ash on mercury existed mainly physical adsorption, the mercury removal efficiency decreased with the increase of temperature, chemical adsorption occurred at 160°C, mercury removal efficiency increased.

scholarly journals Mercury Removal From Coal Combustion Flue Gas by Pyrite-Modified Fly Ash Adsorbent

2021 ◽  
Author(s):  
Liqiang QI ◽  
Xu WANG ◽  
Wen WANG ◽  
Jingxin LI ◽  
Yan HUANG
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Gas Flow ◽  
Active Component ◽  
Mercury Removal ◽  
Gas Flow Rate ◽  
Mercury Adsorption ◽  
Mass Proportion ◽  
Modified Fly Ash

Abstract Pyrite and fly ash have certain advantages in adsorption and mercury oxidation. The pyrite-modified fly ash (PY+AC-FA) mercury adsorbent was prepared by mixing pyrite (PY) with acid-modified fly ash (AC-FA), which has better mercury removal effect than AC-FA. The experimental results of mercury adsorption show: when the reaction temperature is 50°C, the best doping proportion of modified fly ash is 20wt%, the mass proportion of pyrite to acid modified fly ash is 4:1, and the flue gas flow rate is 1.0L/min, the adsorbent has the best performance, and the adsorption rate of mercury reaches 91.92%. BET, XRD, SEM, TG-DSG and XRF were used to characterize these adsorbents. And the mechanism of mercury removal of pyrite-modified fly ash adsorbent is inferred: Hg0 is first adsorbed on the surface of the adsorbent, and then oxidized to HgS by the active component FeS2 in pyrite-modified fly ash.

Surface modification of fly ash by non-thermal air plasma for elemental mercury removal from coal-fired flue gas

2019 ◽  
pp. 1-12 ◽  
Author(s):  
Mengting Shi ◽  
Guangqian Luo ◽  
Hailu Zhu ◽  
Renjie Zou ◽  
Jingyuan Hu ◽  
...  
Keyword(s):  
Surface Modification ◽  
Fly Ash ◽  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Air Plasma

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

Mercury removal from coal combustion flue gas by modified fly ash

2013 ◽  
Vol 25 (2) ◽  
pp. 393-398 ◽  
Author(s):  
Wenqing Xu ◽  
Hairui Wang ◽  
Tingyu Zhu ◽  
Junyan Kuang ◽  
Pengfei Jing
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal ◽  
Modified Fly Ash

scholarly journals Low-Cost Organic Adsorbents for Elemental Mercury Removal from Lignite Flue Gas

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2174
Author(s):  
Marta Marczak-Grzesik ◽  
Stanisław Budzyń ◽  
Barbara Tora ◽  
Szymon Szufa ◽  
Krzysztof Kogut ◽  
...  
Keyword(s):  
Flue Gas ◽  
Low Cost ◽  
Elemental Mercury ◽  
Mercury Content ◽  
Flue Gases ◽  
Mercury Removal ◽  
Gas Purification ◽  
Gas Temperature ◽  
Corn Straw ◽  
Flue Gas Purification

The research presented by the authors in this paper focused on understanding the behavior of mercury during coal combustion and flue gas purification operations. The goal was to determine the flue gas temperature on the mercury emissions limits for the combustion of lignites in the energy sector. The authors examined the process of sorption of mercury from flue gases using fine-grained organic materials. The main objectives of this study were to recommend a low-cost organic adsorbent such as coke dust (CD), corn straw char (CS-400), brominated corn straw char (CS-400-Br), rubber char (RC-600) or granulated rubber char (GRC-600) to efficiently substitute expensive dust-sized activated carbon. The study covered combustion of lignite from a Polish field. The experiment was conducted at temperatures reflecting conditions inside a flue gas purification installation. One of the tested sorbents—tire-derived rubber char that was obtained by pyrolysis—exhibited good potential for Hg0 into Hg2+ oxidation, resulting in enhanced mercury removal from the flue. The char characterization increased elevated bromine content (mercury oxidizing agent) in comparison to the other selected adsorbents. This paper presents the results of laboratory tests of mercury sorption from the flue gases at temperatures of 95, 125, 155 and 185 °C. The average mercury content in Polish lignite was 465 μg·kg−1. The concentration of mercury in flue gases emitted into the atmosphere was 17.8 µg·m−3. The study analyzed five low-cost sorbents with the average achieved efficiency of mercury removal from 18.3% to 96.1% for lignite combustion depending on the flue gas temperature.

Impact of the mercury removal system using modified fly ash on particulate matter emission

Fuel ◽  
2021 ◽  
Vol 301 ◽  
pp. 121054
Author(s):  
Yue Peng ◽  
Tao Wang ◽  
Yongzheng Gu ◽  
Jiawei Wang ◽  
Yongsheng Zhang ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Fly Ash ◽  
Mercury Removal ◽  
Particulate Matter Emission ◽  
Modified Fly Ash ◽  
Removal System
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