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handle: 10261/4878
[EN]The combustion of coal in conventional power plants produces large amounts of CO2 which contributes to the greenhouse effect. One of the ways to approach the CO2 emmissions abatement is to burn the coal in a O2/CO2 atmosphere which eliminates the need of a separation step. In this study two coals of different rank (a high volatile bituminous and a low volatile bituminous) have been burned in a drop tube reactor using O2/N2 and O2/CO2 mixtures with increasing oxygen content from zero to 21%. Various oxygen concentrations have been selected for each set of experiments in order to follow both the progress of combustion and the influence of oxygen content in the devolatilisation behaviour of coal.
[ES]La combustión de carbón en centrales térmicas produce grandes cantidades de CO2 que contribuyen al efecto invernadero. Una de las opciones para reducir las emisiones de CO2 es quemar el carbón en atmósfera de O2/CO2 que elimina la necesidad de un paso posterior de depuración de CO2. En este estudio, se han realizado experimentos de combustión con dos carbones de distinto rango en un reactor de caída libre utilizando mezclas O2/N2 y O2/CO2 hasta una concentración del 21%. Se han seleccionado varias concentraciones de oxígeno con el fin de hacer un seguimiento tanto del proceso de combustión como del efecto del oxígeno en la desvolatilización del carbón.
Financiación de los proyectos “Hacia la combustión del carbón con emisiones cero de CO2 empleando tecnología oxy-fuel” del El Principado de Asturias y Endesa (PC03-04) y “Procesos avanzados de generación, captura y almacenamiento de CO2” del Ministerio de Educación y Ciencia (PSE2-2005).
Peer reviewed
Oxicombustión, Reactividad, Carbón pulverizado, Conversión, Char
Oxicombustión, Reactividad, Carbón pulverizado, Conversión, Char
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