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Grindability and combustion behavior of coal and torrefied biomass blends

AutorGil Matellanes, María Victoria ; García, R.; Pevida García, Covadonga ; Rubiera González, Fernando
Palabras claveTorrefaction
Biomass
Coal
Co-combustion
Grindability
Fecha de publicación9-may-2015
EditorElsevier
CitaciónBioresource Technology 191: 205-212 (2015)
ResumenBiomass samples (pine, black poplar and chestnut woodchips) were torrefied to improve their grindability before being combusted in blends with coal. Torrefaction temperatures between 240 and 300 °C and residence times between 11 and 43 min were studied. The grindability of the torrefied biomass, evaluated from the particle size distribution of the ground sample, significantly improved compared to raw biomass. Higher temperatures increased the proportion of smaller-sized particles after grinding. Torrefied chestnut woodchips (280 °C, 22 min) showed the best grinding properties. This sample was blended with coal (5–55 wt.% biomass). The addition of torrefied biomass to coal up to 15 wt.% did not significantly increase the proportion of large-sized particles after grinding. No relevant differences in the burnout value were detected between the coal and coal/torrefied biomass blends due to the high reactivity of the coal. NO and SO2 emissions decreased as the percentage of torrefied biomass in the blend with coal increased.
Versión del editorhttp://dx.doi.org/10.1016/j.biortech.2015.04.117
URIhttp://hdl.handle.net/10261/124698
DOI10.1016/j.biortech.2015.04.117
ISSN0960-8524
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