Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/31723
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Ash Deposition in a Pulverized Coal-Fired Power Plant after High-Calcium Lignite Combustion

AuthorsFernandez-Turiel, J. L. CSIC ORCID ; Georgakopoulos, Andreas; Gimeno, D.; Papastergios, Georgios; Kolovos, Nestoras
Issue Date2004
PublisherAmerican Chemical Society
CitationEnergy and Fuels 18(5): 1512-1518 (2004)
AbstractThe fabric, mineralogy, and chemistry of high-calcium ash deposits from the Agios Dimitrios pulverized-lignite power plant in northern Greece have been investigated as a key to the ability to improve the performance of the power plant. All inner surfaces in the boiler are covered with a layer of particulate matter showing various degrees of agglomeration or with fouling deposits. Agglomerated fabric occurs in the lower and upper furnace sections, whereas sintered textures are mainly observed in the air heater sections. Particles in the size range of 10−50 μm with no sign of large agglomeration constitute the fly ash. Calcium mineral phases are dominant in deposits (anhydrite (CaSO4), calcite (CaCO3), portlandite (Ca(OH)2), and lime (CaO)); however, there are also significant amounts of silicon-containing minerals in bottom ash and fly ash (quartz (SiO2), gehlenite (Ca2Al2SiO7), and anorthite (CaAl2Si2O8)). Gas−solid reactions control deposition, without the participation of alkaline element compounds in the buildup of deposits. Technological modifications in the facility cannot improve the situation significantly, because of the fact that these effects are the consequence of the thermal decomposition of the high content of calcite (CaCO3) in the feed lignite, coming from the lignite seams and the intermediate sterile layers co-excavated with the lignite. Only through improvement of the quality of the lignite during mining can the power plant improve its operations.
Description7 páginas, 5 figuras, 2 tablas.
Publisher version (URL)http://dx.doi.org/10.1021/ef0400161
URIhttp://hdl.handle.net/10261/31723
DOI10.1021/ef0400161
ISSN0887-0624
Appears in Collections:(Geo3Bcn) Artículos

Files in This Item:
File Description SizeFormat
ef0400161.pdf393,18 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

SCOPUSTM   
Citations

67
checked on May 13, 2022

WEB OF SCIENCETM
Citations

61
checked on May 13, 2022

Page view(s)

440
checked on May 17, 2022

Download(s)

417
checked on May 17, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.