Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Chen, Dunkui; Hu, Hongyun; Zhang, Xu; Liu, Huan; Cao, Jin-Xiu; Shen, Junhao; Yao, Hong

doi:10.1016/j.cej.2015.01.035

Cited by 117 publications

(67 citation statements)

References 33 publications

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“…This finding is consistent with the previous studies that arsenic in fly ash was mainly present as As 5+ with lower concentrations of As 3+ [184][185][186]. This was partly caused by the interaction of As2O3(g) in the As 3+ form with CaO in fly ash, which formed the stable As 5+ compounds [76,81,[187][188][189]. In the work of Goodarzi et al [50], a medium volatile bituminous coal with an ash content of 34 wt.% was combusted in a 150-MW Canadian power plant.…”

Section: Speciation Transformation Of Arsenicsupporting

confidence: 92%

“…CaO+SO2(g) [69,71,80,81]. Moreover, some researchers mentioned that Cl or Br could also react with calcium, which could change the final effect of sulfur on arsenic [82].…”

Section: Sulfur and Chlorinementioning

confidence: 99%

“…Because of their availability and low cost, calcium-based sorbents are widely used for SO2 and CO2 capture and many researchers have explored the adsorption properties of calcium-based sorbents, mainly CaO, Ca(OH)2, 2CaO•SiO2, and CaO•SiO2 for gaseous arsenic retention [71,80,81,237,238]. Due to differences in the specific surface area of calcium-based materials, reported concentrations of gaseous arsenic and adsorption time vary considerably among different studies and specific values of adsorption experiments (adsorption efficiency, amount of arsenic captured, etc.)…”

Section: Removal Of Arsenic By Calcium-based Sorbentsmentioning

confidence: 99%

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Review of arsenic behavior during coal combustion: Volatilization, transformation, emission and removal technologies

Wang

Liu

Zhang

et al. 2018

Progress in Energy and Combustion Science

154

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Growing public awareness of the environmental impact of coal combustion has raised serious concerns about the various hazardous trace elements produced by coal firing. Arsenic deserves special attention due to its toxicity, volatility, bioaccumulation in the environment, and potential carcinogenic properties. As the main anthropogenic source of arsenic is coal combustion, its behavior in power plants is of concern. Unlike mercury, arsenic behavior in coal combustion has not been subjected to systematic, in-depth research. Different researchers have reached opposing conclusions about the behavior of arsenic in combustion systems and as yet there is relatively little research on arsenic-removal technologies. In this paper, the volatilization, transformation, and emission behavior of arsenic and its removal technologies are discussed in depth. Factors affecting the volatilization characteristics of arsenic are summarized, including temperature, pressure, mode of occurrence of arsenic, coal rank, mineral matter, and the sulfur and chlorine content of the fuel. The behavior of arsenic during oxy-fuel combustion and the effect of combustion atmosphere (O2, CO2, SO2 and H2O(g)) are also reviewed in detail. In order to better understand the pathway of arsenic in a power plant environment, a particular focus in this work is the transformation mechanism of ultra-fine ash particles and the partitioning behavior of arsenic. Finally, the effects of air pollution control devices (APCDs) on arsenic emissions are examined, along with the

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Section: Speciation Transformation Of Arsenicsupporting

confidence: 92%

“…CaO+SO2(g) [69,71,80,81]. Moreover, some researchers mentioned that Cl or Br could also react with calcium, which could change the final effect of sulfur on arsenic [82].…”

Section: Sulfur and Chlorinementioning

confidence: 99%

Section: Removal Of Arsenic By Calcium-based Sorbentsmentioning

confidence: 99%

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Review of arsenic behavior during coal combustion: Volatilization, transformation, emission and removal technologies

Wang

Liu

Zhang

et al. 2018

Progress in Energy and Combustion Science

154

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“…These elements have the potential to react with arsenic to form some thermally stable compounds. Chen et al [52] has proved that increasing the temperature from 600 to 800℃ enhances the capture of arsenic by CaO. Therefore, whilst it is noted that arsenic release decreased from 600 to 800℃, this can be attributed to the formation of inorganic compounds and the fixation of arsenic in the ash matrix [53,54] .…”

Section: Arsenic Release During Pyrolysis and Gasificationmentioning

confidence: 99%

Arsenic transformation behaviour during thermal decomposition of P. vittata, an arsenic hyperaccumulator

Duan

Jiang

et al. 2017

Journal of Analytical and Applied Pyrolysis

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Please refer to any applicable publisher terms of use. Highlights As release and recovery have been clearly elaborated during pyrolysis and gasification of P. vittata in this study. The As concentration and speciation are determined by HPLC-ICP-MS. The As solubility in solid residue shows significant difference between low and high temperatures. The soluble As in solid residue mainly presents as As 5+ .

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“…4f). The arsenic was captured by CaO in the reaction through direct condensation and/or physical adsorption [21,22]. These samples were analyzed by XRD to analyze the defect of calcium sulfate phase structure (Fig.…”

Section: Sem Xrd Patterns Of the Solid In The 1st Stagementioning

confidence: 99%

A novel strategy for arsenic removal from dirty acid wastewater via CaCO3-Ca(OH)2-Fe(III) processing

Lü

Chen

et al. 2016

Journal of Water Process Engineering

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Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

Cited by 117 publications

References 33 publications

Review of arsenic behavior during coal combustion: Volatilization, transformation, emission and removal technologies

Review of arsenic behavior during coal combustion: Volatilization, transformation, emission and removal technologies

Arsenic transformation behaviour during thermal decomposition of P. vittata, an arsenic hyperaccumulator

A novel strategy for arsenic removal from dirty acid wastewater via CaCO3-Ca(OH)2-Fe(III) processing

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