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

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.

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

10.21203/rs.3.rs-177766/v1 ◽

2021 ◽

Author(s):

Marta Marczak-Grzesik ◽

Stanisław Budzyń ◽

Barbara Tora ◽

Szymon Szufa ◽

Krzysztof Kogut ◽

...

Keyword(s):

Flue Gas ◽

Raw Materials ◽

Low Cost ◽

Elemental Mercury ◽

Mercury Content ◽

Flue Gases ◽

Mercury Removal ◽

Gas Temperature ◽

Corn Straw ◽

The Impact

Abstract Based on the knowledge of the impact of aspects tied to and utilised technology and raw materials on the speciation of mercury in the flue gas, the authors have undertaken the task of examining the process of sorption of mercury from flue gases using fine-grained organic materials. The main objectives of this study was to recommend a Low-Cost Organic Asorbent such as coke dust CD, Corn straw char CS-400, Brominated Corn straw char CS-400-Br, Rubber Char RC-600 and Granulated Rubber Char GRC-600 to efficiently substitute expensive dust-sized activated carbon. The study covered combustion of lignite from Polish field. The experiment was conducted at temperatures reflecting conditions inside a flue gas purification installation. 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 analysed 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. Two of the tested sorbents exhibited good potential for Hg0 into Hg2 + oxidation, resulting in enhanced mercury removal from the flue.

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Preparation of SiO2–TiO2 Nanocomposite and Its Application on Elemental Mercury Removal in Simulated Flue Gas

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.960-961.456 ◽

2014 ◽

Vol 960-961 ◽

pp. 456-461

Author(s):

Xue Shi ◽

Bu Ni ◽

Chao En Li ◽

Xian Li ◽

Chong Zhang ◽

...

Keyword(s):

Removal Efficiency ◽

Flue Gas ◽

Low Cost ◽

Physical Method ◽

Elemental Mercury ◽

Mercury Removal ◽

Photocatalytic Ability ◽

Absorption Of Light ◽

Nanocomposite Catalyst ◽

Direct Adsorption

SiO2–TiO2 nanocomposite was synthesized by an ultrasound-assisted pure physical method to oxidize elemental mercury (Hg0) in simulated flue gas. Due to its low cost and photocatalytic ability, SiO2 was used to dope TiO2 to modify the TiO2 photocatalyst. We put different ratio of TiO2 / SiO2 under the UV irradiation to get a low Ti/Si doping ratio and high flue gas mercury removal efficiency of SiO2–TiO2 nanocomposite catalyst. It was found that the photocatalytic activity of nanocomposite materials did not significantly improve, or even decline. This is mainly because that the presence of too much porous SiO2 may affect TiO2 on the effective absorption of light and direct adsorption of contaminants. When Ti: Si ratio was 2:1, SiO2–TiO2 nanocomposite catalyst reached its highest elemental mercury removal efficiency in the simulated flue gas.

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FLUE GAS PURIFICATION FROM SULFUR OXIDES AND ASH DURING SOLID FUEL COMBUSTION IN LOW-POWER BOILERS

International Journal of Energy for a Clean Environment ◽

10.1615/interjenercleanenv.2020034671 ◽

2020 ◽

Vol 21 (4) ◽

pp. 355-374

Author(s):

S. V. Plashykhin ◽

T. V. Bojko ◽

D. N. Skladannyy ◽

Ju. A. Zaporozhets ◽

Artem S. Safiants

Keyword(s):

Low Power ◽

Solid Fuel ◽

Flue Gas ◽

Fuel Combustion ◽

Sulfur Oxides ◽

Gas Purification ◽

Solid Fuel Combustion ◽

Flue Gas Purification

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Application of Disk Aerators to Recarbonation of Alkaline Wastewater from Wet Gasification of Carbide

Water Science & Technology ◽

10.2166/wst.1991.0211 ◽

1991 ◽

Vol 24 (7) ◽

pp. 277-284 ◽

Cited By ~ 2

Author(s):

E. Gomólka ◽

B. Gomólka

Keyword(s):

Carbon Dioxide ◽

Liquid Phase ◽

Gas Phase ◽

Flue Gas ◽

Carbonic Acid ◽

Low Cost ◽

Flue Gases ◽

Carbon Dioxide Content ◽

Patent Claim ◽

Phase Dispersion

Whenever possible, neutralization of alkaline wastewater should involve low-cost acid. It is conventional to make use of carbonic acid produced via the reaction of carbon dioxide (contained in flue gases) with water according to the following equation: Carbon dioxide content in the flue gas stream varies from 10% to 15%. The flue gas stream may either be passed to the wastewater contained in the recarbonizers, or. enter the scrubbers (which are continually sprayed with wastewater) from the bottom in oountercurrent. The reactors, in which recarbonation occurs, have the ability to expand the contact surface between gaseous and liquid phase. This can be achieved by gas phase dispersion in the liquid phase (bubbling), by liquid phase dispersion in the gas phase (spraying), or by bubbling and spraying, and mixing. These concurrent operations are carried out during motion of the disk aerator (which is a patent claim). The authors describe the functioning of the disk aerator, the composition of the wastewater produced during wet gasification of carbide, the chemistry of recarbonation and decarbonation, and the concept of applying the disk aerator so as to make the wastewater fit for reuse (after suitable neutralization) as feeding water in acetylene generators.

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New Approach to the Emission of Flue Gases Caused by Sludge Incineration in the Netherlands

Water Science & Technology ◽

10.2166/wst.1992.0509 ◽

1992 ◽

Vol 25 (4-5) ◽

pp. 307-314 ◽

Cited By ~ 3

Author(s):

A. W. van der Vlies ◽

J. H. B. te Marvelde

Keyword(s):

Sewage Sludge ◽

The Netherlands ◽

Flue Gas ◽

Flue Gases ◽

Gas Purification ◽

Incineration Plant ◽

New Approach ◽

Sludge Incineration ◽

Limited Degree ◽

The Town

Recycling of sewage sludge will soon no longer be possible in The Netherlands, or will be possible only to a very limited degree. For that reason, part of the sewage sludge will have to be incinerated. This will happen particularly in those areas where tipping space is very limited. A sludge incineration plant is planned to be built in the town of Dordrecht, with a capacity of 45,000 tonnes dry solids per year. The plant will be subject to the very strict flue gas emission requirements of the Dutch Guideline on Incineration. The Guideline demands a sophisticated flue gas purification procedure.

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Effect of flue gas purification facilities of coal-fired power plant on mercury emission

Energy Reports ◽

10.1016/j.egyr.2021.01.094 ◽

2021 ◽

Vol 7 ◽

pp. 190-196

Author(s):

Bing Li ◽

Hongliang Wang

Keyword(s):

Power Plant ◽

Flue Gas ◽

Gas Purification ◽

Mercury Emission ◽

Flue Gas Purification

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Carbon consumption and adsorption-regeneration of H2S on activated carbon for coke oven flue gas purification

Environmental Science and Pollution Research ◽

10.1007/s11356-021-14914-2 ◽

2021 ◽

Author(s):

Yuting Lin ◽

Yuran Li ◽

Zhicheng Xu ◽

Junxiang Guo ◽

Tingyu Zhu

Keyword(s):

Activated Carbon ◽

Flue Gas ◽

Coke Oven ◽

Gas Purification ◽

Carbon Consumption ◽

Flue Gas Purification

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Analysis of Foreign Experience in Using Flue Gas Purification Systems at Waste-to-Energy Plants

Vestnik MEI ◽

10.24160/1993-6982-2021-2-11-19 ◽

2021 ◽

Vol 2 (2) ◽

pp. 11-19

Author(s):

Anton N. Efremov ◽

◽

Aleksey A. Dudolin ◽

Keyword(s):

Flue Gas ◽

Power Plants ◽

Waste To Energy ◽

Gas Purification ◽

Acid Gases ◽

Purification System ◽

Flue Gas Purification ◽

Property Assessment ◽

Application Fields ◽

Energy Plants

The existing method for selecting the structure of a power plant for thermally recycling municipal solid waste (MSW) in the Russian Federation does not address the matter of selecting all components of an energy complex operating on MSW, but places focus on determining the best accessible waste thermal neutralization technology. This generates the need to search for new methods and to select criteria of choosing the structure for each particular project. A comparative analysis of various structural schemes of waste-to-energy plants widely used outside of Russia will make it possible to reveal their main advantages and drawbacks, and to determine their application fields. The article describes the statistical indicators characterizing the operation of the flue gas purification system from acid gases, which can be applied in performing a feasibility study, intellectual property assessment, and in carrying out front-end engineering. For waste-to-energy plants constructed in an urban environment and aimed to operate with keeping to a minimum the gross emissions of acid gases into the atmospheric air, the use of a wet reactor system is recommended, which will ensure low emissions of HF, HCl, and SOx. The system with a wet reactor will make it possible to reduce gross emissions of harmful substances during the operation of large capacity waste-to-energy power plants and will be a justified choice in such case. In constructing medium capacity waste-to-energy plants (with a throughput of up to 350 000 t of MSW per annum), semi-dry and dry reactors can be used; for such plants, the technology involving the use of a semi-dry reactor is the most preferred one.

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