Environmentally critical elements in channel and cleaned samples of Illinois coals

Demir, Ilham; Ruch, R.R.; Damberger, H.H.; Harvey, Richard D.; Steele, John D.; Ho, Ken

doi:10.1016/s0016-2361(97)00164-6

Cited by 37 publications

(15 citation statements)

References 21 publications

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“…Here we are dealing with a different case to that described in the literature (Demir et al, 1998;Toole-O' Neil et al, 1999), in which the mercury content in the analyzed seam samples is equal to or lower than the mercury content in the commercial products comprising the separated coal. This shows that the objective of seam sampling, and thus the sampling technique, and in particular the decision of whether or not to reject the contaminants in the seams influences the assessment of mercury contamination in commercial coal.…”

Section: Maps Of the Variability Of Mercury Content In The Carbonifermentioning

confidence: 98%

“…In the literature, remarks can be found that suggest the application of coefficients which decrease the mercury content determined during the coal seam examination stage, before the obtained information is used for the assessment of the mercury emission threat. The coefficients should reflect the degree to which the mercury content in the coal is reduced during coal cleaning (Demir et al, 1998;Toole-O' Neil et al, 1999). The above occurs in the analyses of coal seams throughout their entire cross sections together with the contaminants in the seams.…”

Section: Introductionmentioning

confidence: 99%

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Variability of Mercury Content in Coal Matter From Coal Seams of The Upper Silesia Coal Basin

Wierzchowski

Chećko

Pyka

2017

Archives of Mining Sciences

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The process of identifying and documenting the quality parameters of coal, as well as the conditions of coal deposition in the seam, is multi-stage and extremely expensive. The taking and analyzing of seam samples is the method of assessment of the quality and quantity parameters of coals in deep mines. Depending on the method of sampling, it offers quite precise assessment of the quality parameters of potential commercial coals. The main kind of seam samples under consideration are so-called "documentary seam samples", which exclude dirt bands and other seam contaminants. Mercury content in coal matter from the currently accessible and exploited coal seams of the Upper Silesian Coal Basin (USCB) was assessed. It was noted that the mercury content in coal seams decreases with the age of the seam and, to a lesser extent, seam deposition depth. Maps of the variation of mercury content in selected lithostratigraphic units (layers) of the Upper Silesian Coal Basin have been created.

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Section: Maps Of the Variability Of Mercury Content In The Carbonifermentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Variability of Mercury Content in Coal Matter From Coal Seams of The Upper Silesia Coal Basin

Wierzchowski

Chećko

Pyka

2017

Archives of Mining Sciences

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“…The only element bromine has the removability greater than that of the removability of ash (0.177). Demir et al (1998) realized that elements with a reduction more than that of ash are enriched in coarse minerals, such as epigenetic pyrite, sphalerite, galena, and calcite, which are relatively easily removed by conventional coal cleaning. Consequently, it is reasonably inferred that the elements with a removability more than that of ash are mainly associated with coarse minerals that are possibly epigenetic in origin.…”

Section: Resultsmentioning

confidence: 99%

Pre-combustion removal possibility of hazardous trace elements from Indian high-ash coal by coal preparation technologies

Mohanta

Meikap

2016

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Many of the potentially hazardous air pollutants listed in the 1990 Clean Air Act are elements commonly found in trace amounts in coal. When coal is burned, these elements release into the environment. An option for controlling the release of these elements into the atmosphere is to remove them before combustion. Conventional physical coal cleaning processes are effective in reducing the concentration of many of these trace elements in coal. In addition, advanced cleaning processes directed toward reduction of various elements may perform better than conventional processes. Therefore, current research focuses on the advanced coal cleaning technology which is directed toward reduction of mineral matter and various toxics elements as well. Results of recent studies indicate that the degree to which a specific trace element can be reduced by coal cleaning depends on its distribution in the coal. To quantify the capabilities of a gravity-based coal cleaning process for removing these hazardous air pollutants, a detail study was conducted on a coal sample collected from one mine of Talcher area. Careful analysis of the experimental data indicates that most of the trace elements of greatest environmental concern are strongly associated with the organic matter of the investigated coal, thus during beneficiation these elements are concentrated in the clean coal fraction. Therefore, it makes the situation more complex and the expected pre-combustion removal of these trace elements seems to be not possible for the high-ash non-coking coals of Talcher coal field.

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“…3. Demir et al (1998) believed that elements with a reduction more than that of ash are enriched in coarse minerals, such as epigenetic pyrite, sphalerite, galena and calcite, which are relatively easily removed by conventional coal cleaning. Consequently, it is reasonably inferred that these elements with a removability more than that (0.48) of ash are mainly associated with coarse minerals that are possibly epigenetic in origin.…”

Section: Partitioning Of the Elementsmentioning

confidence: 99%

“…Twelve inorganic elements As, Be, Cd, Cl, Co, Cr, Hg, Mn, Ni, Pb, Sb and Se are listed as potentially hazardous air pollutants (HAPs) in the 1990 US Clean Air Act Amendments. In response to this, some researchers (Luttrell et al, 2000;Demir et al, 1998;Akers, 1995;Finkelman, 1994;Devito et al, 1994) studied the degree of reduction of these elements by cleaning. However, in addition to the 12 HAP elements, other elements, such as Ba, Br, Cu, Mo, P, Th, U, V, Zn, etc., considered by Swaine (1990) and Finkelman (1995) to be of environmental concern should also be studied for their removal behavior during coal cleaning.…”

Section: Introductionmentioning

confidence: 99%

Partitioning of elements and macerals during preparation of Antaibao coal

Wang

Qin

Wei

et al. 2006

International Journal of Coal Geology

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Environmentally critical elements in channel and cleaned samples of Illinois coals

Cited by 37 publications

References 21 publications

Variability of Mercury Content in Coal Matter From Coal Seams of The Upper Silesia Coal Basin

Variability of Mercury Content in Coal Matter From Coal Seams of The Upper Silesia Coal Basin

Pre-combustion removal possibility of hazardous trace elements from Indian high-ash coal by coal preparation technologies

Partitioning of elements and macerals during preparation of Antaibao coal

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