Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant

Sung, Jooyoung; Back, Seung Ki; Jung, Bup Mook; Kang, Youn Suk; Lee, Chul Gyu; Jang, HeeJin; Seo, Yong Chil

doi:10.1016/j.coal.2016.10.008

Cited by 26 publications

(6 citation statements)

References 28 publications

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“…Sixty-nine on-site tests of the cobenefit mercury removal efficiencies from existing studies are summarized in Table (more details can be seen in SI Table S4). ,,,− The uncertainty bounds of the APCD removal efficiencies for the uncertainty analysis are summarized in SI Table S4. Generally, PC boilers burning anthracite demonstrated higher Hg removal than similarly equipped boilers burning bituminous coal, which could achieve higher mercury removal than those burning lignite coal. , CFB boilers equipped with ESP or FF showed a higher average cobenefit removal efficiency than PC boilers also equipped with ESP or FF. , …”

Section: Methodsmentioning

confidence: 99%

“…Hg 0 can be retained for several months with a long transport distance until settling out through dry and wet deposition processes, while Hg 2+ and Hg P can be retained for only hours to weeks. , To identify the current status and future fate of Hg from coal-fired power plants, Table summarizes the 30 existing Hg speciation profiles of coal-fired flue gas. Details are given in SI Table S5. ,,,− …”

Section: Methodsmentioning

confidence: 99%

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A Highly Resolved Mercury Emission Inventory of Chinese Coal-Fired Power Plants

Liu

Wang

et al. 2018

Environ. Sci. Technol.

162

102

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As the largest coal consumer in China, the coal-fired power plants have come under increasing public concern in regard to atmospheric mercury pollution. This study developed an up-to-date and high-resolution mercury emission inventory of Chinese coal-fired power plants using a unit-based method that combined data from individual power plants, provincial coal characteristics, and industry removal efficiencies. National mercury emissions in 2015 were estimated at 73 tons, including 54 tons of elemental mercury, 18 tons of gaseous oxidized mercury and 1 ton of particle-bound mercury. Pulverized coal boilers emitted 65 tons, mainly in the coastal provinces and coal-electricity bases. Circulating fluidized bed boilers emitted 8 tons, mainly in Inner Mongolia and Shanxi Province. The average mercury emission intensity over the Chinese mainland was 18.3 g/GWh, which was similar to the limit for low-rank coal-fired units in the United States. The overall uncertainty of national mercury emission was estimated to be -19% to 20%, with the mercury content in coal being the major contributor. In most provinces, monthly mercury emissions generally peaked in December and August. However, monthly partition coefficients of southwest China were obviously lower than other regions from June to October due to the high proportion of hydropower generation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A Highly Resolved Mercury Emission Inventory of Chinese Coal-Fired Power Plants

Liu

Wang

et al. 2018

Environ. Sci. Technol.

162

102

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“…It is desired that charged particles penetration through the electrostatic precharger should be high, and the filtration process have to occur only at the filter by building loose dendrites on the fibers [18][19][20][21][22]. In another version, the particle precharger is integrated with bag filters by interlacing a row of bag with a row of discharge electrodes separated by a grounded grid or arranged in a "matrix" [4,9,[23][24][25][26]. In such a device, the particles are charged and partly precipitated by an electrostatic precharger or precipitator with perforated collection electrodes.…”

Section: Hybrid Filtration Backgroundmentioning

confidence: 99%

Hybrid electrostatic filtration systems for exhaust gas cleaning

Jaworek,

Sobczyk,

Marchewicz

et al. 2024

J. Phys.: Conf. Ser.

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Emission of submicron and nanoparticles by industrial processes, like coal or biomass combustion, solid waste incineration, cement kiln heating, and glass production is a serious environmental problem. The application of most effective bag filters is limited due to very high temperature of the exhaust gases from most of these processes, sometimes >1000 K, which the filter material cannot resists. Cyclones, which could be resistant to these temperatures, are not effective for PM2.5 particles removal, which are the most abundant in these processes. Electrostatic precipitators remove dust from flue gases with high mass collection efficiency, but in submicron range (~100 nm to 1 μm) the so called “penetration window” occurs, in which the fractional collection efficiency decreases even below 50% at minimum. Hybrid electrostatic filtration systems, which combines various conventional gas-cleaning devices were therefore proposed and tested in several research papers, in order to improve the overall collection efficiency of the precipitation processes. The heart in all of these devices is an electrostatic particle charger, which can be a conventional electrostatic precipitator, a corona-discharge particle precharger, or electrostatic particle agglomerator. After charging and/or agglomeration, the particles can be further removed by other devices like cyclones, electrostatic precipitators, or bag filters (after gas cooling to an allowable temperature). The paper reviews specific problems encountered in exhaust gas cleaning from various industrial processes, and the most interesting constructions designed for this goal. In particular, an example of a system comprising a unipolar electrostatic agglomerator, which simultaneously charges the particles and agglomerates them in alternating electric field, for the formation of aggregates of finer particles (PM1) with larger species, which could be removed by any conventional gas cleaning device, with sufficiently high collection efficiency, has been discussed in details.

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“…Mercury is a toxic air pollutant with high volatility, and is harmful to human health and ecosystem [1][2][3][4][5]. Thermal power plant is considered to be a main source of gaseous anthropogenic mercury emissions in China [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

HCl-Induced Hg0 Transformation over CuMn2O4 Sorbent

Zhang¹,

Yang²,

Jing³

et al. 2022

Energy Engineering

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CuMn 2 O 4 spinel has been regarded as a highly efficient sorbent for Hg 0 capture from flue gas. The regenerability and recyclability of CuMn 2 O 4 sorbent are mainly associated with the mercury speciation adsorbed on its surface. However, the effect mechanism of HCl on Hg 0 transformation over CuMn 2 O 4 sorbent is still elusive. Experiments were conducted to understand the effect of HCl on Hg 0 transformation over CuMn 2 O 4 sorbent. The results indicate that CuMn 2 O 4 sorbent is a mesoporous material and possesses a good thermal stability. CuMn 2 O 4 shows >95% Hg 0 removal efficiency in a wide temperature window of 50-350 • C. The favorable electron-transfer environment caused by the mixed valence states of Cu and Mn cations is responsible for the excellent Hg 0 removal performance of CuMn 2 O 4 sorbent. CuMn 2 O 4 shows a higher Hg 0 adsorption capacity of 4774.57 μg/g. Hg 0 adsorption process over CuMn 2 O 4 sorbent can be well described by the developed kinetic model. Hg 0 removal efficiency of CuMn 2 O 4 sorbent does not depend on the presence of HCl. Mercury species adsorbed on the CuMn 2 O 4 sorbent in the presence of HCl mainly exist in the forms of HgO and HgCl 2 O 8 • H 2 O. HCl shows a significant effect on mercury speciation over CuMn 2 O 4 sorbent. Most of HgO species will be transformed into HgCl 2 O 8 • H 2 O in the presence of HCl.

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Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant

Cited by 26 publications

References 28 publications

A Highly Resolved Mercury Emission Inventory of Chinese Coal-Fired Power Plants

A Highly Resolved Mercury Emission Inventory of Chinese Coal-Fired Power Plants

Hybrid electrostatic filtration systems for exhaust gas cleaning

HCl-Induced Hg0 Transformation over CuMn2O4 Sorbent

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