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Título

Changes in coal char reactivity and texture during combustion in an entrained flow reactor

AutorArias Rozada, Borja ; Pevida García, Covadonga ; Rubiera González, Fernando ; Pis Martínez, José Juan
Palabras claveEntrained flow reactor
Intrinsic char reactivity
N2 surface area
Fecha de publicaciónmar-2007
EditorSpringer
CitaciónJournal of Thermal Analysis and Calorimetry 90(3): 859-863 (2007)
ResumenChar particle combustion is the slowest step in the combustion of coal, therefore char reactivity and texture have an important influence on this process. In this work, two coals were devolatilised in an entrained flow reactor and the chars obtained were burned under different experimental conditions in order to achieve various degrees of burnoff. Char reactivity was determined by means of non-isothermal thermogravimetric analysis, and the conversion-time data were evaluated by the random pore model proposed by Bhatia and Perlmutter. Char texture was characterised by means of N2 and CO2 adsorption isotherms. The surface areas obtained were used to calculate intrinsic reaction rate parameters. It was found that under chemical controlled conditions, the available surface area during combustion is best represented by the N2 surface area.
Versión del editorhttp://dx.doi.org/10.1007/s10973-006-8265-z
URIhttp://hdl.handle.net/10261/103376
DOI10.1007/s10973-006-8265-z
ISSN1388-6150
E-ISSN1572-8943
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