Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 90: Issue 3
Changes in coal char reactivity and texture during combustion in an entrained flow reactor
Authors:
B. Arias CSIC Instituto Nacional del Carbón Apartado 73 33080 Oviedo Spain

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C. Pevida CSIC Instituto Nacional del Carbón Apartado 73 33080 Oviedo Spain

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F. Rubiera CSIC Instituto Nacional del Carbón Apartado 73 33080 Oviedo Spain

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J. Pis CSIC Instituto Nacional del Carbón Apartado 73 33080 Oviedo Spain

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Pages:
859–863
Online Publication Date:
29 Apr 2007
Publication Date:
01 Dec 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-8265-z
Keywords:
entrained flow reactor; intrinsic char reactivity; N2 surface area
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Abstract  

Char 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.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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