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Título

Sulfur retention in an oxy-fuel bubbling fluidized bed combustor: Effect of coal rank, type of sorbent and O 2 /CO 2 ratio

AutorObras-Loscertales, Margarita de las; Diego Poza, Luis F. de ; García-Labiano, Francisco; Rufas, Aránzazu; Abad Secades, Alberto ; Gayán Sanz, Pilar ; Adánez Elorza, Juan
Palabras claveOxy-fuel combustion
Fluidized bed
Sulfur retention
Calcium sorbents
CO 2 capture
Fecha de publicación1-dic-2014
EditorElsevier
CitaciónFuel 137: 384-392 (2014)
ResumenIn this work, SO2 retention via calcium-based sorbents added in a continuous bubbling fluidized bed combustor (~3 kWth) operating in oxy-fuel combustion mode is analyzed. Tests were performed at different operating temperatures with three sorbents, two limestones and one dolomite, and with three coals, ranging from lignite to anthracite, to analyze the influence of coal rank, type of sorbent, sorbent particle size, and O2/CO2 feeding ratio on the sulfation process It was found that the combustor temperature had a strong influence on the limestones sulfur retention with a maximum at 900-925 ºC. The behavior of the limestones was qualitatively similar with the three coals, attaining the highest sulfur retention values working with the lignite and the lowest working with the bituminous coal. On the contrary, with the dolomite the sulfur retention was hardly affected by the combustion temperature and the sulfur retentions attained were higher than with the limestones. The sulfur retention increased with diminishing the Ca-based sorbent particle size, and it was hardly affected by the O2/CO2 ratio fed into the combustor.
Versión del editorhttp://dx.doi.org/10.1016/j.fuel.2014.07.097
URIhttp://hdl.handle.net/10261/138156
DOIhttp://dx.doi.org/10.1016/j.fuel.2014.07.097
ISSN0016-2361
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