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1

The impact of sulphate corrosion limitation in power boilers on the properties of ash from biomass combustion

100%
Kepys W.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 2
Due to the content of alkaline compounds, biomass combustion inflicts unfavourable effects on boilers, such as: corrosion, slagging, and fouling of the bed. One of the methods to limit these processes is adding sulphur to the boiler. This article presents the results of studies on the impact of adding sulphur into the boiler (where biomass is combusted), and on the properties of the formed fly ash and bottom ash. As a result, sulphur compounds were mainly in fly ash, which makes it impossible to utilize it in the manner that coal fly ash is normally used.
2

Research into the usefulness of ash from the co-combustion of lignite and biomass in mining technologies

63%
Kepys W., Pomykala R.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 4
Biomass is a kind of fuel that is more and more often used in the energy industry. It supplements coal and allows it to meet the requirements of producing “green” energy and limit CO2 or sulphur emissions. Research refers to the ash originated from the combustion of the lignite with and without the wood biomass in the CFB boiler. This article shows the results of research into physical-chemical properties of fly ash obtained from the combustion of the lignite with and without the wood biomass (wood pellet). The possibilities of the use of this ash include in suspension technologies widely used in coal mines.
3

The influence of high temperature on the properties of solidified suspension made of ash from fluidized combustion of lignite

51%
Pomykala R., Kepys W., Lyko P.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 4
Our article shows the results of research on ash-water solidified suspensions heated at high temperatures. The ash-water suspensions are used in underground coal mines to fill the voids and cavings resulting from exploitation. The heating of the solidified samples has been conducted to simulate conditions of the process of self-heating of residual coal substances. Similar conditions may also occur on the surface, e.g. during fires, and knowledge of the influence of the high temperatures on these type of materials may be useful when such substances are used as components of the building materials. For testing purposes we have used the ash from the fluidized bed combustion of lignite with and without the addition of the biomass. The conducted research covered the definition of the high temperature influence on the structure, leachability, phase composition, and mechanical properties of the suspension samples.
4

Co-combustion of coal and biomass – chemical properties of ash

45%
Trybalski K., Kepys W., Krawczykowska A., Krawczykowski D., Szponder D.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 4
This article describes the chemical properties of the resulting ash from co-combustion of hard coal with biomass. Biomass consisted of sunflower husks, bran grains, and forest biomass. To test the fly ash we sampled from different types of boilers: pulverized, fluidized, and in the case of pulverized boilers ash samples with and without desulfurization products were tested. The results were compared with the properties of ash without co-combustion, which were obtained in the same type of boilers. Chemical and mineralogical compositions were determined and thermal analysis was carried out as well. Studies showed no effect of co-combustion biomass with coal on the tested properties of obtained ash.
5

Physical properties of ash from co-combustion of coal and biomass

45%
Trybalski K., Kepys W., Krawczykowski D., Krawczykowska A., Szponder D.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 4
This article presents the tests of fly ash properties which originated from co-combustion. The ash samples for testing came from Polish combined heat and power plants co-firing different types of biomass with hard coal in pulverized and fluidized beds. For comparison purposes, the properties of fly ash from coal combustion also were examined. Measured properties include grain composition, specific density, bulk density, and grain shape. Statistical analysis of results did not demonstrate the influence of biomass on the ash properties.
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