English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/127855
Título

Effect of Oxy-Combustion Flue Gas on Mercury Oxidation

AutorFernández Miranda, Nuria ; López Antón, María Antonia ; Díaz Somoano, Mercedes ; Martínez Tarazona, María Rosa
Palabras claveMercury
Speciation
Oxy-fuel combustion
Fecha de publicación30-may-2014
EditorAmerican Chemical Society
CitaciónEnvironmental Science and Technology 48(12): 7164-7170 (2014)
ResumenThis study evaluates the effect of the gases present in a typical oxy-coal combustion atmosphere on mercury speciation and compares it with the mercury speciation produced in conventional air combustion atmospheres. The work was performed at laboratory scale at 150 °C. It was found that the minor constituents (SO2, NOx, and HCl) significantly modify the percentages of Hg2+ in the gas. The influence of these species on mercury oxidation was demostrated when they were tested individually and also when they were blended in different gas compositions, although the effect was different to the sum of their individual effects. Of the minor constituents, NOx were the main species involved in oxidation of mercury. Moreover, it was found that a large concentration of H2O vapor also plays an important role in mercury oxidation. Around 50% of the total mercury was oxidized in atmospheres with H2O vapor concentrations typical of oxy-combustion conditions. When the atmospheres have similar concentrations of SO2, NO, NO2, HCl, and H2O, the proportion of Hg0/Hg2+ is similar regardless of whether CO2 (oxy-fuel combustion) or N2 (air combustion) are the main components of the gas.
Versión del editorhttp://dx.doi.org/10.1021/es500967d
URIhttp://hdl.handle.net/10261/127855
DOI10.1021/es500967d
ISSN0013-936X
Aparece en las colecciones: (INCAR) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Effect_oxy-combustion_Miranda.pdf426,26 kBAdobe PDFVista previa
Visualizar/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.