Comparison of trace element contents of raw and clean commercial coals

DeVito, Matthew S.; Rosendale, Lawrence W.; Conrad, Vincent B.

doi:10.1016/0378-3820(94)90174-0

Cited by 35 publications

(14 citation statements)

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“…Meanwhile, concentration of HTEs can also be reduced during the washing process. The removal efficiency of Ni content through coal cleaning vary significantly from~20% to~80% (DeVito et al, 1984;Akers, 1995;Quick and Irons, 2002;Han and Xu, 2003;Wang, 2007). In view of the application situation and the operation characteristics of coal cleaning processes in China, we presume an averaged removal efficiency of 58.49% independent of Ni content in coals.…”

Section: Nickel Content In Coals and Coal Productsmentioning

confidence: 99%

Anthropogenic atmospheric nickel emissions and its distribution characteristics in China

Tian

Cheng

et al. 2012

Science of The Total Environment

113

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Section: Nickel Content In Coals and Coal Productsmentioning

confidence: 99%

Anthropogenic atmospheric nickel emissions and its distribution characteristics in China

Tian

Cheng

et al. 2012

Science of The Total Environment

113

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“…The reported Hg removal efficiency of coal cleaning varies from about 30% to about 75% and almost all the physical coal cleaning procedures tested on Chinese coals have a Hg removal efficiency larger than 50% (Akers and Dospoy, 1994;Luttrell et al, 2000;Wang et al, 2003;Song et al, 2006;Wang, 2007). The As removal efficiency of coal cleaning can vary from about 40% to about 70% (Akers and Dospoy, 1994;DeVito et al, 1994;Finkelman, 1994;Luttrell et al, 2000;Wang et al, 2003;Wu et al, 2005;Wang, 2007) and most estimates are between 50% and 60%. Thus, we assume the average removal efficiency of Hg and As to be 50% and 54% respectively independent of mercury and arsenic content in raw coal.…”

Section: Averaged Content Of Hg As and Se In Raw Coal And Coal Prodmentioning

confidence: 99%

“…Previous studies have confirmed that Se shows a high organic affinity in coal and in most cases exists in organic phases (Finkelman, 1994;Liu et al, 2003;Zhu et al, 2003;Wang, 2007). As a result, the removal efficiency of Se is relatively low and mostly ranges from 20% to 41.9% (DeVito et al, 1994;Finkelman, 1994;Wang et al, 2003;Song et al, 2006;Wang, 2007). In this study, we assume an average Se removal efficiency of 30%.…”

Section: Averaged Content Of Hg As and Se In Raw Coal And Coal Prodmentioning

confidence: 99%

Trend and characteristics of atmospheric emissions of Hg, As, and Se from coal combustion in China, 1980–2007

et al. 2010

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Abstract. Emissions of hazardous trace elements in China are of great concern because of their negative impacts on local air quality as well as on regional environmental health and ecosystem risks. In this paper, the atmospheric emissions of mercury (Hg), arsenic (As), and selenium (Se) from coal combustion in China for the period 1980-2007 are estimated on the basis of coal consumption data and emission factors, which are specified by different categories of combustion facilities, coal types, and the equipped air pollution control devices configuration (Dust collectors, FGD, etc.). Specifically, multi-year emission inventories of Hg, As, and Se from 30 provinces and 4 economic sectors (thermal power, industry, residential use, and others) are evaluated and analyzed in detail. Furthermore, the gridded distribution of provincialbased Hg, As, and Se emissions in 2005 at a resolution of 1 • × 1 • is also plotted. It shows that the calculated national total atmospheric emissions of Hg, As, and Se from coal combustion have rapidly increased from 73.59 t, 635.57 t, and 639.69 t in 1980 to 305.95 t, 2205.50 t, and 2352.97 t in 2007, at an annually averaged growth rate of 5.4%, 4.7%, and 4.9%, respectively. The industrial sector is the largest source for Hg, As, and Se, accounting for about 50.8%, 61.2%, and 56.2% of the national totals, respectively. The share of power plants is 43.3% for mercury, 24.9% for arsenic, and 33.4% for selenium, respectively. Also, it shows remarkably different regional contribution characteristics of these 3 types of trace elements, the top 5 provinces with the heaviest mercury emissions in 2007 are Shandong (34.40 t), Henan (33.63 t), Shanxi (21.14 t), Guizhou (19.48 t), and Hebei (19.35 , provinces always rank at the top five largest Hg, As, and Se emission sources are: Shandong, Hebei, Shanxi, Henan, and Jiangsu, most of which are located in the east and are traditional industry-based or economically energy intensive areas in China. Notably, Hg, As, and Se emissions from coal combustion in China begin to grow at a more moderate pace since 2005. Emissions from coal-fired power plants sector began to decrease though the coal use had been increasing steadily, which can be mainly attributed to the increasing use of wet flue gas desulfurization (WFGD) in power plants, thus the further research and control orientations of importance for these hazardous trace elements should be the industrial sector.

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“…DeVito, Rosendale, and Conrad (1994) show mercury concentrations at 0.11mg/kg in the total coal from 10 Pittsburgh Seam mines. This is equivalent to 3.67 mg/10 6 Btu.…”

Section: Demonstration Resultsmentioning

confidence: 95%

Epri-Usdoe Cooperative Agreement: Cofiring Biomass With Coal

Tillman¹

2001

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Comparison of trace element contents of raw and clean commercial coals

Cited by 35 publications

References 1 publication

Anthropogenic atmospheric nickel emissions and its distribution characteristics in China

Anthropogenic atmospheric nickel emissions and its distribution characteristics in China

Trend and characteristics of atmospheric emissions of Hg, As, and Se from coal combustion in China, 1980–2007

Epri-Usdoe Cooperative Agreement: Cofiring Biomass With Coal

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