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The mercury analysis in airborne particles emitted from coal-combustion processes

100%
Szynkowska M., Leśniewska E., Pawlaczyk A., Albińska J., Bawolak K., Paryjczak T.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 2
46-48
EN
Determination of trace elements in combusted materials has always been an interesting field of environmental studies. Particulate matter, in particular, is a serious problem which, can lead to air pollution especially by heavy metals emissions in urban and industrial areas. There is a considerable concern about the elevated level of mercury released during combustion and the proportion of anthropogenic mercury in the environment. Nowadays, small-scale installations have been identified as a significant source-pathway for mercury pollution, particularly those that use coal. A total amount of mercury was determined using Mercury Analyzer. The investigated material consists of bottom ash, fly ash, slag, soot or dust. The obtained results varied according to the type of the material and plant. The developed methodology was checked by carrying out the analysis of certificate material of Soil NCS ZC 73001 and the reference material of Soil-7.
2
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Mineral Matter Transformation in OXY-Fuel Coal Combustion

100%
Nowak-Woźny D., Moroń W., Urbanek B., Rybak W.
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vol. 34
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issue 3
393-401
EN
The paper presents the results of the mechanical, electrical, CCSEM and XRD measurements of hard coal, conducted in simulated conditions of sintering in atmospheres of O2/CO2,. The changes of the coal ash resistivity are correlated with the content of the oxides and with the sintering temperature determined by the mechanical test and Leitz method. The SEM-EDS analysis was conducted for deposits on the probe. The changes of the measured ash samples, observed during sintering process in O2/CO2 atmosphere, were discussed in the ash microstructure point of view.
3
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The Influence Of Calcite On The Ash Flow Temperature For Semi-Anthracite Coal From Donbas District

88%
Čarnogurská M., Příhoda M., Pyszko R., Širillová Ľ., Palkóci J.
Chemical and Process Engineering
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2014
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vol. 35
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issue 4
515-525
EN
This paper presents the results of research focused on the lowering of ash flow temperature at semianthracite coal from Donbas district by means of additive (calcite) dosing. Ash fusion temperatures were set for two coal samples (A, B) and for five various states (samples of ash without any additives, with 1%, with 3%, with 5% and with 7% of the additive) in total. The macroscopicphotographic method was used for identifying all specific temperatures. Obtained outputs prove that A type coal has a lower value of sphere temperature than B type coal in the whole scope of percentage representation of the additive. The flow temperature dropped in total from 1489 °C to 1280 °C, i.e. by 14% during the test of coal of type A with 7% of the additive; while it was near 10% for coal of type B (from 1450 °C to 1308 °C). Numerical simulations of the process showed that it is not effective to add an additive with a grain size lower than 280 μm by means of wastevapour burners.
4
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Mineral Matter Transformation in OXY-Fuel Coal Combustion

88%
Nowak-Woźny D., Moroń W., Urbanek B., Rybak W.
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issue 3
5
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The Influence Of Calcite On The Ash Flow Temperature For Semi-Anthracite Coal From Donbas District

75%
Čarnogurská M., Příhoda M., Pyszko R., Širillová Ľ., Palkóci J.
Chemical and Process Engineering
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2014
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issue 4
6
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The Fusion Characteristics of Ashes from Lignin and the Coke Breeze

75%
Fröhlichová M., Findorák R., Legemza J., Džupková M.
Archives of Metallurgy and Materials
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2018
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vol. 63
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issue 3
7
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Lab-Scale Investigations During Combustion of Agricultural Residues and Selected Polish Coals

75%
Kordylewski W. K., Mościcki K. J., Witkowski K. J.
Chemical and Process Engineering
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2014
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issue 2
8
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Lab-Scale Investigations During Combustion of Agricultural Residues and Selected Polish Coals

75%
Kordylewski W. K., Mościcki K. J., Witkowski K. J.
Chemical and Process Engineering
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2014
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vol. 35
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issue 2
249-262
EN
Preliminary lab-scale investigations were conducted on slagging abatement in biomass-firing by fuel mixing. Three agriculture biomass fuels and olive cake were used in the experiments. Polish lignites and bituminous coals were examined as anti-sintering additives. The effects of chlorine release, potassium retention and ash sintering were examined by heating samples of biomass fuels and additives in the muffle oven and, next, firing them in the laboratory down-fired furnace at the temperature in the range of 800-1150ºC. The obtained slag samples were analysed on: chlorine and potassium content, sintering tendency and crystalline components. Among the examined coals lignite from Turów mine and bituminous coal from Bolesław Śmiały mine appeared to be the most effective in potassium retention in aluminosilicate and chlorine release from slag. Possibly the major factor of these coals which reduced ash sintering was relatively high content of kaolinite
9
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The effect of hard coal ashes on the amount and quality of maize yield

63%
Antonkiewicz J.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 3
20-25
EN
The research was conducted in 2003 - 2005 as a pot experiment on mineral soil to which ash doses of between 13.33 g and 800.0 g · pot-1 were supplied in proportions corresponding to the amounts of between 10 and 600 t · ha-1. The investigations aimed at learning the effect of diversified ash doses upon the content, ionic relations and the uptake of Mg, Ca, Na and P by maize. Macroelement concentrations in maize were diversified depending on the object and the plant part, fluctuating from 1.52 - 7.49 g Mg; 3.79 - 11.01 g Ca; 8.07 - 23.86 g K; 0.17 - 1.52 g Na; 1.23 - 3.16 g P · kg-1 d.m. It was found that with the growing ash dose the contents of Mg, Ca, K and Na in maize were increasing systematically, whereas P concentrations were decreasing. Magnesium and potassium content in maize aboveground parts met the requirements for a good quality fodder. The level of calcium, sodium and phosphorus in maize did not remain within the optimal range. A systematic increase in Mg uptake but a decline in P absorption by the aboveground parts were registered in maize in effect of growing ash doses.
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