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Título

Ignition behavior of coal and biomass blends under oxy-firing conditions with steam additions

Autor Riaza Benito, Juan ; Álvarez González, Lucía ; Gil Matellanes, María Victoria ; Khatami, Reza; Levendis, Yiannis A.; Pis Martínez, José Juan ; Pevida García, Covadonga ; Rubiera González, Fernando
Palabras clave Biomass
Coal
Ignition behavior
Oxy-combustion
Steam
Fecha de publicación sep-2013
EditorWiley-VCH
Citación Greenhouse Gases: Science and Technology 3(5): 397-414 (2013)
ResumenThe ignition behavior of coal and biomass blends was assessed in air and oxy-firing conditions in an entrained flow reactor. Four coals of different rank, an anthracite, a semi-anthracite, and two high-volatile bituminous coals, were tested in air and O2/CO2 (21–35% O2) environments. For all the coals, deterioration in ignition properties was observed in the 21%O2/79%CO2 atmosphere in comparison with air. However, the ignition properties were enhanced when the oxygen concentration in the O2/CO2 mixture was increased. Coal and biomass blends of a semi-anthracite and a high-volatile bituminous coal with 10 and 20 wt% of olive residue were also used in the ignition experiments under air and oxy-firing conditions. The ignition behavior of the coals improved as the additions of biomass increased both in air and oxy-firing conditions. In particular, the effect of biomass blending was more noticeable in the ignition of the high rank coal. Since industrial oxy-coal combustion with a wet recycle would result in higher concentrations of H2O(v), the effect of steam addition on ignition behavior was also studied. A worsening in ignition behavior was observed when steam was added to the oxy-fuel combustion atmospheres, although an increase in the steam concentration from 10 to 20% did not produce any significant difference in the ignition characteristics of the fuels.
Versión del editorhttp://dx.doi.org/10.1002/ghg.1368
URI http://hdl.handle.net/10261/112316
DOI10.1002/ghg.1368
E-ISSN2152-3878
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