English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/168073
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Mechanism of interaction of pyrite with hematite as simulation of slagging and fireside tube wastage in coal combustion

AuthorsMayoral Gastón, María del Carmen ; Izquierdo Pantoja, María Teresa ; Andrés Gimeno, José Manuel ; Rubio Villa, Begoña
KeywordsSlagging
Fireside corrosion
Pyrite
Iron oxides
Issue Date13-Feb-2002
PublisherElsevier
CitationThermochimica Acta 390: 103-111 (2002)
AbstractIron-bearing minerals have been recognised as a mayor source of fire-side wall slagging in pulverised fuel boilers, which not only reduces the thermal efficiency of heat transfer of the exchangers surface, but also affects its integrity as a result of corrosion and erosion. Nevertheless, the root cause of adhesion and growing of deposits has not been clearly addressed. Our approach suggests that differential scanning calorimetry (DSC) combined with simultaneous thermogravimetry can follow the chemical reaction between pyrite and the outer layer of iron oxide on tubewalls. The changes in composition are followed by X-ray diffraction (XRD). The results indicated that the mechanism of wetting and adherence of molten pyrite over iron oxides is chemically induced: both di and mono iron sulphides interact with the oxide layer, changing the oxidation state of iron in oxide scale, from hematite to magnetite. This would imply a change in the protective ability of the scale as well as a great increment in corrosion tendency.
Publisher version (URL)https://doi.org/10.1016/S0040-6031(02)00075-8
URIhttp://hdl.handle.net/10261/168073
DOI10.1016/S0040-6031(02)00075-8
ISSN0040-6031
Appears in Collections:(ICB) Artículos
Files in This Item:
File Description SizeFormat 
ARCHIVO COMODIN DIGITAL CSIC.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
 

Related articles:


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