A comprehensive analytical characterization of Greek lignite bottom ash samples
Bottom ash samples were collected from four lignite power plants of Greece. Granulometric analysis was executed and after homogenization four distinct fractions (>1.25, 0.63-1.25, 0.18-0.63, <0.18 mm) were obtained. The samples were analysed by X-ray diffraction and energy dispersive system, w...
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doaj-9a93068a405c41fa83fbe59746ac587d2021-05-27T13:11:56ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632021-01-01253 Part A1879188910.2298/TSCI200606299I0354-98362000299IA comprehensive analytical characterization of Greek lignite bottom ash samplesIordanidis Andreas0Asvesta Argyro1Kapageridis Ioannis2Vasileiadou Agapi3Koios Kyros4Oikonomidis Stavros5Kantiranis Nikolaos6Department of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, GreeceDepartment of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, GreeceDepartment of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, GreeceDepartment of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, Greece + Department of Environmental Engineering, Faculty of Engineering, Democritus University of Thrace, Xanthi, GreeceDepartment of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, GreeceSchool of Geology, Aristotle University of Thessaloniki, Thessaloniki, GreeceSchool of Geology, Aristotle University of Thessaloniki, Thessaloniki, GreeceBottom ash samples were collected from four lignite power plants of Greece. Granulometric analysis was executed and after homogenization four distinct fractions (>1.25, 0.63-1.25, 0.18-0.63, <0.18 mm) were obtained. The samples were analysed by X-ray diffraction and energy dispersive system, while thermo-gravimetric and stereomicroscope viewing were applied for the coarse fractions. Furthermore, proximate analysis (moisture, ash, volatiles, fixed carbon) was un-dertaken and loss on ignition and calorific values were determined. The particle size distribution revealed that bottom ash satisfies the gradation criteria for concrete and geotechnical applications. The mineral composition included mainly amorphous matter, quartz, plagioclase, calcite and gehlenite and minor amounts of pyroxene, portlandite, hematite, micas, etc. The chemical analysis showed Si, Ca, Al, Mg, Fe, S as major and Ti and K as minor chemical elements, indicating high slagging, and fouling potential within the thermal chambers. Based on the chemistry and mineralogy of the bottom ash samples, a potential utilization in concrete manufacturing is discussed, taking into account certain limitations. Based on loss on ignition, proximate analysis, calorific values and thermogravi-metric profiles of the coarse fractions (>1.25 mm), certain differences in the characteristics of the bottom ash of the younger and the three older power plants were observed. High amounts of unburnt carbon were determined in the coarse fraction (>1.25 mm) of all plants except the younger one, indicating a problematic combustion within the chambers and a potential of reburning these coarse material in a waste to energy application.http://www.doiserbia.nb.rs/img/doi/0354-9836/2021/0354-98362000299I.pdflignite bottom ashgrain size distributionmineralogygeochemistrythermogravimetryenergy dispersive systemx-ray diffractioncalorific valueproximate analysisenergy recovery |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Iordanidis Andreas Asvesta Argyro Kapageridis Ioannis Vasileiadou Agapi Koios Kyros Oikonomidis Stavros Kantiranis Nikolaos |
spellingShingle |
Iordanidis Andreas Asvesta Argyro Kapageridis Ioannis Vasileiadou Agapi Koios Kyros Oikonomidis Stavros Kantiranis Nikolaos A comprehensive analytical characterization of Greek lignite bottom ash samples Thermal Science lignite bottom ash grain size distribution mineralogy geochemistry thermogravimetry energy dispersive system x-ray diffraction calorific value proximate analysis energy recovery |
author_facet |
Iordanidis Andreas Asvesta Argyro Kapageridis Ioannis Vasileiadou Agapi Koios Kyros Oikonomidis Stavros Kantiranis Nikolaos |
author_sort |
Iordanidis Andreas |
title |
A comprehensive analytical characterization of Greek lignite bottom ash samples |
title_short |
A comprehensive analytical characterization of Greek lignite bottom ash samples |
title_full |
A comprehensive analytical characterization of Greek lignite bottom ash samples |
title_fullStr |
A comprehensive analytical characterization of Greek lignite bottom ash samples |
title_full_unstemmed |
A comprehensive analytical characterization of Greek lignite bottom ash samples |
title_sort |
comprehensive analytical characterization of greek lignite bottom ash samples |
publisher |
VINCA Institute of Nuclear Sciences |
series |
Thermal Science |
issn |
0354-9836 2334-7163 |
publishDate |
2021-01-01 |
description |
Bottom ash samples were collected from four lignite power plants of Greece. Granulometric analysis was executed and after homogenization four distinct fractions (>1.25, 0.63-1.25, 0.18-0.63, <0.18 mm) were obtained. The samples were analysed by X-ray diffraction and energy dispersive system, while thermo-gravimetric and stereomicroscope viewing were applied for the coarse fractions. Furthermore, proximate analysis (moisture, ash, volatiles, fixed carbon) was un-dertaken and loss on ignition and calorific values were determined. The particle size distribution revealed that bottom ash satisfies the gradation criteria for concrete and geotechnical applications. The mineral composition included mainly amorphous matter, quartz, plagioclase, calcite and gehlenite and minor amounts of pyroxene, portlandite, hematite, micas, etc. The chemical analysis showed Si, Ca, Al, Mg, Fe, S as major and Ti and K as minor chemical elements, indicating high slagging, and fouling potential within the thermal chambers. Based on the chemistry and mineralogy of the bottom ash samples, a potential utilization in concrete manufacturing is discussed, taking into account certain limitations. Based on loss on ignition, proximate analysis, calorific values and thermogravi-metric profiles of the coarse fractions (>1.25 mm), certain differences in the characteristics of the bottom ash of the younger and the three older power plants were observed. High amounts of unburnt carbon were determined in the coarse fraction (>1.25 mm) of all plants except the younger one, indicating a problematic combustion within the chambers and a potential of reburning these coarse material in a waste to energy application. |
topic |
lignite bottom ash grain size distribution mineralogy geochemistry thermogravimetry energy dispersive system x-ray diffraction calorific value proximate analysis energy recovery |
url |
http://www.doiserbia.nb.rs/img/doi/0354-9836/2021/0354-98362000299I.pdf |
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