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1
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Effective diffusivity of moisture in low rank coal during superheated steam drying at atmospheric pressure

100%
Pakowski Z., Adamski R., Kwapisz S.
Chemical and Process Engineering
|
2012
|
issue 1
2
Content available remote

Effective diffusivity of moisture in low rank coal during superheated steam drying at atmospheric pressure

100%
Pakowski Z., Adamski R., Kwapisz S.
Chemical and Process Engineering
|
2012
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vol. 33
|
issue 1
43-51
EN
The effective diffusivity of water in brown coal of Bełchatów mine was experimentally determined. The experiments were performed in superheated steam at 200°C and atmospheric pressure using slightly compressed pellets of cylindrical shape. The drying and temperature curves of the sample were used to identify diffusivity. An inverse problem was formulated and solved by the finite element method for 3D axially symmetric cylindrical geometry of the sample. A satisfactory fit of the simulated curves to experimental results was obtained. The obtained dependence of effective diffusivity on moisture content and temperature may be used in designing lignite dryers.
3
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Model Research of Gas Emissions From Lignite and Biomass Co-Combustion in a Large Scale CFB Boiler

88%
Krzywański J., Rajczyk R., Nowak W.
Chemical and Process Engineering
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2014
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vol. 35
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issue 2
217-231
EN
The paper is focused on the idea of a combustion modelling of a large-scale circulating fluidised bed boiler (CFB) during coal and biomass co-combustion. Numerical computation results for three solid biomass fuels co-combustion with lignite are presented in the paper. The results of the calculation showed that in previously established kinetics equations for coal combustion, some reactions had to be modified as the combustion conditions changed with the fuel blend composition. Obtained CO2, CO, SO2 and NOx emissions are located in borders of ± 20% in the relationship to the experimental data. Experimental data was obtained for forest biomass, sunflower husk, willow and lignite cocombustion tests carried out on the atmospheric 261 MWe COMPACT CFB boiler operated in PGE Turow Power Station in Poland. The energy fraction of biomass in fuel blend was: 7%wt, 10%wt and 15%wt. The measured emissions of CO, SO2 and NOx (i.e. NO + NO2) were also shown in the paper. For all types of biomass added to the fuel blends the emission of the gaseous pollutants was lower than that for coal combustion.
4
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Model Research of Gas Emissions From Lignite and Biomass Co-Combustion in a Large Scale CFB Boiler

75%
Nowak W., Krzywański J., Rajczyk R.
Chemical and Process Engineering
|
2014
|
issue 2
5
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Risks Related to Energy Policy of Poland Until 2040 (EPP 2040)

75%
Tajduś A., Tokarski S., Tajduś A., Tokarski S.
Archives of Mining Sciences
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2020
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vol. 65
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issue 4
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