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Título: | Effect of oxy-fuel combustion with steam addition on coal ignition and burnout in an entrained flow reactor |
Autor: | Riaza Benito, Juan CSIC ORCID; Álvarez González, Lucía CSIC; Gil Matellanes, María Victoria CSIC ORCID ; Pevida García, Covadonga CSIC ORCID ; Pis Martínez, José Juan CSIC; Rubiera González, Fernando CSIC ORCID | Palabras clave: | Oxy-fuel combustion Pulverized coal Steam addition Ignition Burnout Entrained flow reactor |
Fecha de publicación: | ago-2011 | Editor: | Elsevier | Citación: | Energy 36(8): 5314-5319 (2011) | Resumen: | The ignition temperature and burnout of a semi-anthracite and a high-volatile bituminous coal were studied under oxy-fuel combustion conditions in an entrained flow reactor (EFR). The results obtained under oxy-fuel atmospheres (21%O2–79%CO2, 30%O2–70% O2 and 35%O2–65%CO2) were compared with those attained in air. The replacement of CO2 by 5, 10 and 20% of steam in the oxy-fuel combustion atmospheres was also evaluated in order to study the wet recirculation of flue gas. For the 21%O2–79%CO2 atmosphere, the results indicated that the ignition temperature was higher and the coal burnout was lower than in air. However, when the O2 concentration was increased to 30 and 35% in the oxy-fuel combustion atmosphere, the ignition temperature was lower and coal burnout was improved in comparison with air conditions. On the other hand, an increase in ignition temperature and a worsening of the coal burnout was observed when steam was added to the oxy-fuel combustion atmospheres though no relevant differences between the different steam concentrations were detected. | Versión del editor: | http://dx.doi.org/10.1016/j.energy.2011.06.039 | URI: | http://hdl.handle.net/10261/103883 | DOI: | 10.1016/j.energy.2011.06.039 | ISSN: | 0360-5442 | E-ISSN: | 1873-6785 |
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