The outcomes of the 2-decade monthly monitoring of fly ash-composition in a lignite-fired power station

Itskos, G; Itskos, S; Moutsatsou, A; Vasilatos, C; Koukouzas, N; Kakaras, E

dc.contributor.author	Itskos, G	en
dc.contributor.author	Itskos, S	en
dc.contributor.author	Moutsatsou, A	en
dc.contributor.author	Vasilatos, C	en
dc.contributor.author	Koukouzas, N	en
dc.contributor.author	Kakaras, E	en
dc.date.accessioned	2014-03-01T01:34:46Z
dc.date.available	2014-03-01T01:34:46Z
dc.date.issued	2010	en
dc.identifier.issn	18772641	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20848
dc.subject	Fly ash	en
dc.subject	Hellenic thermal power stations	en
dc.subject	Lignite	en
dc.subject	Lignite-xylite co-firing	en
dc.subject	Specific consumption	en
dc.subject.other	Grain fraction	en
dc.subject.other	Industry applications	en
dc.subject.other	Lignite fly ash	en
dc.subject.other	Lignite-fired power stations	en
dc.subject.other	Metallic surface	en
dc.subject.other	Power production	en
dc.subject.other	Power station	en
dc.subject.other	Production process	en
dc.subject.other	Severe erosion	en
dc.subject.other	Specific consumption	en
dc.subject.other	Thermal power stations	en
dc.subject.other	Cement industry	en
dc.subject.other	Lignite	en
dc.subject.other	Metallic compounds	en
dc.subject.other	Power plants	en
dc.subject.other	Production engineering	en
dc.subject.other	Sulfur	en
dc.subject.other	Fly ash	en
dc.title	The outcomes of the 2-decade monthly monitoring of fly ash-composition in a lignite-fired power station	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s12649-010-9041-7	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s12649-010-9041-7	en
heal.publicationDate	2010	en
heal.abstract	In the current study, the evolution of the composition of fly ash (FA), since the beginning of operation of the lignite-fired power station of Amynteon-Filotas [Steam Electric Station (SES) Amynteon-Filotas] in Greece, is presented. The respective evolution of the feedcoal-composition is also showed. This power station began to operate in 1987. Before that, it was predicted that lignite fly ash would turn from strongly calcareous to barely pozzolanic. Moreover, the variation of sulphur (%) (both total and volatile) in feedcoal had revealed that fly ash would not often meat the specifications to be used in the production process of concrete, due to the excessive percentage presence of SO3. These predictions were eventually confirmed in the 23 years of operation of the power station. During these years SO3 (%) kept alternating, rendering-in some cases-fly ash suitable for use in cement industry applications. The periodical changes of the SO3 concentration in fly ash were attributed to the free (volatile) sulphur of feedcoal as well as to the excess of FeS2, which had also a serious effect on the daily power production process (severe erosion of the metallic surfaces of boiler). A number of solutions for tackling this phenomenon are suggested in this study: discard of specific FA grain fractions, intense monitoring of the material and its effective mixture-homogenization and selective mining of lignite. © Springer Science+Business Media B.V. 2010.	en
heal.journalName	Waste and Biomass Valorization	en
dc.identifier.doi	10.1007/s12649-010-9041-7	en
dc.identifier.volume	1	en
dc.identifier.issue	4	en
dc.identifier.spage	431	en
dc.identifier.epage	437	en