English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/157367
Título

The fate of mercury in fluidized beds under oxy-fuel combustion conditions

AutorObras-Loscertales, Margarita de las; Izquierdo Pantoja, María Teresa ; Rufas, Aránzazu; Diego Poza, Luis F. de ; García Labiano, Francisco ; Abad Secades, Alberto ; Gayán Sanz, Pilar ; Adánez Secades, Alberto
Palabras claveCO2 capture
Oxy-fuel combustion
Fluidized bed
Mercury emissions
Fecha de publicación1-mar-2016
EditorElsevier
CitaciónFuel 167: 75-81 (2016)
ResumenAmong the different pollutant gases released from oxy-coal combustion, mercury is the responsible for important operational issues in the CO2 processing unit, being able to cause material corrosion. Some studies concerning the fate of mercury during oxy-coal combustion are referred to pulverized coal (PC) boilers. However, the fate of mercury emissions in fluidized bed (FB) combustors has yet to be elucidated. In this work, mercury emissions from a 3 kWth bubbling FB combustor operating under oxy-fuel combustion conditions have been evaluated. For this purpose, two Spanish Ca-based sorbents and two Spanish coals were used. The effects of type of Ca-based sorbent, the Ca/S molar ratio, temperature and recycled gases (NO, SO2 and H2O) typical in oxy-fuel combustion process on the distribution of mercury species have been analyzed. It was observed that the presence of Ca-based sorbents in the combustor favored mercury fixation as particle-bound mercury which exhibited a maximum at a temperature about 925 °C corresponding to the highest degree of limestone sulfation. SO2 recirculation inhibited the Hg0 oxidation and thus the mercury fixation as particle-bound mercury decreased. However, neither NO nor steam recirculation affected mercury speciation.
Versión del editorhttps://doi.org/10.1016/j.fuel.2015.11.045
URIhttp://hdl.handle.net/10261/157367
DOI10.1016/j.fuel.2015.11.045
ISSN0016-2361
Aparece en las colecciones: (ICB) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Postprint Fuel 167_2016_75-81.docx798,4 kBMicrosoft Word XMLVisualizar/Abrir
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.