Experimental simulation of trace element evolution from the excluded mineral fraction during coal combustion using GFAAS and TGA–DSC

Raeva, Anna A.; Nagaraju, D.; Artemyeva, Anastasia A.; Kozliak, Evguenii; Pierce, David T.; Seames, Wayne

doi:10.1016/j.fuel.2014.01.078

Cited by 23 publications

(13 citation statements)

References 46 publications

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“…An improved graphite furnace atomic absorption spectrometry(GFAAS) method, complemented by thermal gravimetric analyzer/differential scanning calorimeter(TGA/DSC) experiments, was first used to study trace element partitioning from mineral exclusions by Raeva et al [193]. However, this method had limitations for trace element and inorganic matrix speciation because samples had to be introduced into the furnace in a homogeneous form.…”

Section: Speciation Transformation Of Arsenicmentioning

confidence: 99%

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

170

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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 Arsenicmentioning

confidence: 99%

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

170

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“…Some fluorides and selenides are found in raw coal and char samples, which indicates that there is a competing mechanism of partitioning behavior of F and Se, such as the volatility of F and Se and the hindering influence of minerals. In addition, inorganic cationic matrices, such as iron and calcium, also influence TE atomization [47], which suggests that the partitioning behavior of TEs, such as that of As in Figure 1, is different from the anticipated volatilization degree. Hence, a calcium-based absorber may be useful for the TE solidification in solid products.…”

Section: Effect Of Temperature On Mineralogical Characteristics Durinmentioning

confidence: 99%

The Fate of Trace Elements in Yanshan Coal during Fast Pyrolysis

et al. 2016

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Abstract:In this study, a high-sulfur and high-ash yield coal sample obtained from the Yanshan coalfield in Yunnan, China was analyzed. A series of char samples was obtained by pyrolysis at various temperatures (300, 400, 500, 600, 700, 800, and 900˝C) and at a fast heating rate (1000˝C/min). A comprehensive investigation using inductively coupled plasma mass spectrometry (ICP-MS), a mercury analyzer, ion-selective electrode (ISE) measurements, X-ray diffraction (XRD) analysis, and Fourier transform infrared (FTIR) spectroscopy was performed to reveal the effects of the pyrolysis temperature on the transformation behavior of trace elements (TEs) and the change in the mineralogical characteristics and functional groups in the samples. The results show that the TE concentrations in the raw coal are higher than the average contents of Chinese coal. The concentrations of Be, Li, and U in the char samples are higher than those in raw coal, while the opposite was observed for As, Ga, Hg, and Rb. The F and Se concentrations are initially higher but decrease with pyrolysis temperature, which is likely caused by associated fracturing with fluoride and selenide minerals. Uranium shows the highest enrichment degree, and Hg shows the highest volatilization degree compared to the other studied TEs. As the temperature increases, the number of OH groups decreases, and the mineral composition changes; for example, pyrite decomposes, while oldhamite and hematite occur in the chars. It is suggested that the behavior and fate of TEs in coal during fast pyrolysis are synergistically influenced by self-characteristic modes of occurrence and mineralogical characteristics.

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“…To date, many analysis techniques have been used to test for Al 3+ including atomic absorption spectrometry, electrochemical analysis, complexometric titration, ultraviolet spectrometry, and fluorescence . Among these methods, fluorescence probes have been widely welcomed due to their simple processing, signal stabilization, reliable performance, and fast response .…”

Section: Introductionmentioning

confidence: 99%

A highly selective aggregation‐induced emission fluorogen for sensitive detection of Al³⁺ in living cells

Xie

Yan

et al. 2019

Luminescence

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A Schiff's base derivative was synthesized using a condensation reaction between 8formyl-7-hydroxy-4-methylcoumarin and furan-2-carbohydrazide that produced marked aggregation-induced emission and had excellent ability to specifically recognize aluminium ions (Al 3+ ). This compound displayed faint fluorescence in the benign solvent dimethyl formamide, and exhibited obvious green fluorescence following addition of specific amounts of water. Moreover, it exhibited strong blue fluorescence after combination with Al 3+ even in the presence of other interfering ions.These experimental results demonstrated that this derivative could be used as a fluorescence probe for Al 3+ . The advantages, including significant fluorescence change, high selectivity and sensitivity, and fast response, meant that this probe could be used both to detect Al 3+ in water samples and for fluorescence imaging in living cells.

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Experimental simulation of trace element evolution from the excluded mineral fraction during coal combustion using GFAAS and TGA–DSC

Cited by 23 publications

References 46 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

The Fate of Trace Elements in Yanshan Coal during Fast Pyrolysis

A highly selective aggregation‐induced emission fluorogen for sensitive detection of Al³⁺ in living cells

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Experimental simulation of trace element evolution from the excluded mineral fraction during coal combustion using GFAAS and TGA–DSC

Cited by 23 publications

References 46 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

The Fate of Trace Elements in Yanshan Coal during Fast Pyrolysis

A highly selective aggregation‐induced emission fluorogen for sensitive detection of Al3+ in living cells

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Product

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A highly selective aggregation‐induced emission fluorogen for sensitive detection of Al³⁺ in living cells