English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/108704
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:

Differential partitioning and speciation of Hg in wet FGD facilities of two Spanish PCC power plants

AutorOchoa González, Raquel ; Córdoba, Patricia; Díaz Somoano, Mercedes ; Font, Oriol; López Antón, María Antonia ; Leiva, C.; Martínez Tarazona, María Rosa ; Querol, Xavier; Fernández Pereira, C.; Tomás, A.; Gómez, P.; Mesado, P.
Palabras claveMercury partitioning
Fecha de publicaciónoct-2011
CitaciónChemosphere 85(4): 565-570 (2011)
ResumenThis paper evaluates the speciation and partitioning of mercury in two Spanish pulverised coal combustion power plants (PP1 and PP2), equipped with wet limestone-based flue gas desulphurisation facilities (FGD) operating with forced oxidation and re-circulation of FGD water streams. These plants are fed with coal (PP1) and coal/pet-coke blends (PP2) with different mercury contents. The behaviour, partitioning and speciation of Hg were found to be similar during the combustion processes but different in the FGD systems of the two power plants. A high proportion (86–88%) of Hg escaped the electrostatic precipitator in gaseous form, Hg2+ being the predominant mercury species (68–86%) to enter the FGD. At this point, a relatively high total Hg retention (72% and 65%) was achieved in the PP1 and PP2 (2007) FGD facilities respectively. However, during the second sampling campaign for PP2 (2008), the mercury removal achieved by the FGD was much lower (26%). Lab-scale tests point to liquid/gas ratio as the main parameter affecting oxidised mercury capture in the scrubber. The partitioning of the gaseous mercury reaching the FGD system in the wastes and by-products differed. In the low mercury input power plant (PP1) most of the mercury (67%) was associated with the FGD gypsum. Moreover in PP2 a significant proportion of the gaseous mercury reaching the FGD system remained in the aqueous phase (45%) in the 2007 sampling campaign while most of it escaped in 2008 (74%). This may be attributed to the scrubber operating conditions and the different composition and chemistry of the scrubber solution probably due to the use of an additive.
Versión del editorhttp://dx.doi.org/10.1016/j.chemosphere.2011.06.081
Aparece en las colecciones: (INCAR) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Differential_Ochoa.pdf360,72 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.