Mercury Removal from Coal Combustion Flue Gas by Fly Ash

2012 ◽  
pp. 395-399
Author(s):  
Junyan Kuang ◽  
Wenqing Xu ◽  
Tingyu Zhu ◽  
Pengfei Jing
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal

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.

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

Regenerable Cobalt Oxide Loaded Magnetosphere Catalyst from Fly Ash for Mercury Removal in Coal Combustion Flue Gas

2014 ◽  
Vol 48 (24) ◽  
pp. 14837-14843 ◽  
Author(s):  
Jianping Yang ◽  
Yongchun Zhao ◽  
Junying Zhang ◽  
Chuguang Zheng
Keyword(s):  
Fly Ash ◽  
Cobalt Oxide ◽  
Flue Gas ◽  
Coal Combustion ◽  
Mercury Removal

Effect of fly ash composition on the retention of mercury in coal-combustion flue gas

2016 ◽  
Vol 142 ◽  
pp. 6-12 ◽  
Author(s):  
Ping He ◽  
Xianbing Zhang ◽  
Xiaolong Peng ◽  
Jiang Wu ◽  
Xiuming Jiang
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Ash Composition

Comment on the “Role of SO2for Elemental Mercury Removal from Coal Combustion Flue Gas by Activated Carbon”

2008 ◽  
Vol 22 (5) ◽  
pp. 3557-3558 ◽  
Author(s):  
Evan J. Granite ◽  
Albert A. Presto
Keyword(s):  
Activated Carbon ◽  
Flue Gas ◽  
Coal Combustion ◽  
Elemental Mercury ◽  
Mercury Removal

Synergistic Mercury Removal over the CeMnO3 Perovskite Structure Oxide as a Selective Catalytic Reduction Catalyst from Coal Combustion Flue Gas

2018 ◽  
Vol 32 (11) ◽  
pp. 11785-11795 ◽  
Author(s):  
Shibo Zhang ◽  
Yongchun Zhao ◽  
Mercedes Díaz-Somoano ◽  
Jianping Yang ◽  
Junying Zhang
Keyword(s):  
Selective Catalytic Reduction ◽  
Flue Gas ◽  
Coal Combustion ◽  
Perovskite Structure ◽  
Catalytic Reduction ◽  
Mercury Removal ◽  
Selective Catalytic Reduction Catalyst

Removal of elemental mercury in flue gas by Cu-Fe modified magnetosphere from coal combustion fly ash

Fuel ◽  
2020 ◽  
Vol 271 ◽  
pp. 117668 ◽  
Author(s):  
Yang Li ◽  
Lixin Dang ◽  
He Yang ◽  
Jie Li ◽  
Haoquan Hu
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Elemental Mercury

scholarly journals Ammonia in Fly Ashes from Flue Gas Denitrification Process and its Impact on the Properties of Cement Composites

Buildings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 225 ◽  
Author(s):  
Agnieszka Michalik ◽  
Joanna Babińska ◽  
Filip Chyliński ◽  
Artur Piekarczuk
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Coal Combustion ◽  
Catalytic Reduction ◽  
Structural Features ◽  
Cement Composites ◽  
Fly Ashes ◽  
Ammonia Content ◽  
Denitrification Process ◽  
Flue Gas Denitrification

The paper presents the results of research on the properties of fly ashes from the process of flue gas denitrification by selective non-catalytic reduction (SNCR), consisting of dosing urea into the coal combustion chamber. The research was carried out on two types of fly ash: Silica fly ash from flue gas denitrification and ash from a traditional boiler without the flue gas denitrification process. The scope of comparative studies included physicochemical and structural features of ashes, as well as slurries and mortars with the addition of ashes. Fly ash from denitrification, whose ammonia content at the time of sampling was 75 mg/kg at the maximum, was examined. Our own research has shown that fly ash from flue gas denitrification is characterized by a higher value of losses on ignition and ammonia content in comparison to ashes without denitrification. It was shown that the ammonia content in the analyzed range does not limit the use of fly ash as an additive to cement and concrete.

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.

Experimental Study on Influence of Fly Ash on Mercury Removal in Flue Gas with UV Light

2013 ◽  
Vol 864-867 ◽  
pp. 1546-1551
Author(s):  
Yin Xia Cao ◽  
Ji Hui Fang ◽  
Jiang Wu ◽  
Xian Li ◽  
Chong Zhang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Uv Light ◽  
Mercury Content ◽  
Mercury Removal ◽  
Mercury Adsorption ◽  
Important Condition ◽  
Photocatalytic Effect ◽  
Photocatalytic Removal ◽  
Different Characteristics

The original fly ash samples fetched from the power plant and the treated fly ash samples after screening, magnetic separation and mixing were used in the experiment of photocatalytic removal on mercury in flue gas. The fly ash samples and the absorption solution after experiment were tested for mercury content. The results showed that different sizes of the original fly ash had different characteristics of photocatalytic removal of mercury. The adsorption of mercury by fly ash was an important condition for the occurrence of photocatalytic effect. When the mercury adsorption capacity of fly ash was stronger, the capacity of photocatalytic removal mercury was also greater. The presence of iron oxide on the fly ash surface can promote the capability of photocatalytic removal of mercury by fly ash. The presence of ultraviolet light can significantly promote Hg0 oxidize to Hg2+ by fly ash. Thus the oxidized mercury in the flue gas can be easily absorbed by the solution.

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