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Title

Effect of biomass blending on coal ignition and burnout during oxy-fuel combustion

AuthorsArias Rozada, Borja ; Pevida García, Covadonga ; Rubiera González, Fernando ; Pis Martínez, José Juan
KeywordsOxy-combustion
Biomass
Ignition
Burnout
Issue Date20-Feb-2008
PublisherElsevier
CitationFuel 87(12): 2753-2759 (2008)
AbstractOxy-fuel combustion is a GHG abatement technology in which coal is burned using a mixture of oxygen and recycled flue gas, to obtain a rich stream of CO2 ready for sequestration. An entrained flow reactor was used in this work to study the ignition and burnout of coals and blends with biomass under oxy-fuel conditions. Mixtures of CO2/O2 of different concentrations were used and compared with air as reference. A worsening of the ignition temperature was detected in CO2/O2 mixtures when the oxygen concentration was the same as that of the air. However, at an oxygen concentration of 30% or higher, an improvement in ignition was observed. The blending of biomass clearly improves the ignition properties of coal in air. The burnout of coals and blends with a mixture of 79%CO2–21%O2 is lower than in air, but an improvement is achieved when the oxygen concentration is 30 or 35%. The results of this work indicate that coal burnout can be improved by blending biomass in CO2/O2 mixtures.
Description7 pages, 7 figures, 1 table.-- Printed version published Sep 2008.
Publisher version (URL)http://dx.doi.org/10.1016/j.fuel.2008.01.020
URIhttp://hdl.handle.net/10261/10991
DOIhttp://dx.doi.org/10.1016/j.fuel.2008.01.020
ISSN0016-2361
Appears in Collections:(INCAR) Artículos
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