caa a22 4500 463189728 CHVBK 20180406164905.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10973-006-8265-z doi (NATIONALLICENCE)springer-10.1007/s10973-006-8265-z Changes in coal char reactivity and texture during combustion in an entrained flow reactor [Elektronische Daten] [B. Arias, C. Pevida, F. Rubiera, J. Pis] 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. Springer Science+Business Media, LLC., 2007 entrained flow reactor nationallicence intrinsic char reactivity nationallicence N2 surface area nationallicence Arias B. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut Pevida C. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut Rubiera F. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut Pis J. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/3(2007-12-01), 859-863 1388-6150 90:3<859 2007 90 10973 https://doi.org/10.1007/s10973-006-8265-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8265-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arias B. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut NATIONALLICENCE 700 1- Pevida C. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut NATIONALLICENCE 700 1- Rubiera F. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut NATIONALLICENCE 700 1- Pis J. Instituto Nacional del Carbón, CSIC, Apartado 73, 33080, Oviedo, Spain aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/3(2007-12-01), 859-863 1388-6150 90:3<859 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer