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Title

Mercury and selenium retention in fly ashes: Influence of unburned particle content

AuthorsLópez Antón, María Antonia ; Díaz Somoano, Mercedes ; Abad Valle, Patricia ; Martínez Tarazona, María Rosa
KeywordsMercury
Selenium
Fly ash
Issue Date16-Apr-2007
PublisherElsevier
CitationFuel 86(14): 2064-6070 (2007)
AbstractMercury and selenium are present as trace elements in coal and may be emitted to the environment in gas phase during coal conversion processes or be partially retained on the fly ashes. The present work explores the possibility that selenium may contribute to mercury capture in fly ashes in two different situations: firstly the power station itself, in order to evaluate the influence of typical working conditions, and secondly in a fixed bed of fly ashes enriched with Se, in order to study the capture of mercury in more severe conditions. It was found that the presence of selenium in fly ashes may improve their capacity to capture mercury. However, in the four fly ashes of different origin studied, selenium is not the most important component for mercury retention. In fact, the presence of selenium in fly ash samples enriched in unburned carbon does not have any significant effect on mercury retention.
Description7 pages, 6 figures, 2 tables.-- Printed version published Sep 2007.-- Issue title: "The 6th European Conference on Coal Research and its Applications".
Publisher version (URL)http://dx.doi.org/10.1016/j.fuel.2007.03.031
URIhttp://hdl.handle.net/10261/11011
DOI10.1016/j.fuel.2007.03.031
ISSN0016-2361
Appears in Collections:(INCAR) Artículos
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