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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

EXPERIMENTAL INVESTIGATION OF CHAR COMBUSTION KINETICS - CO/CO2 RATIO DURING COMBUSTION

Get access (open in a dialog) DOI: 10.1615/IHTC10.4990
pages 81-86

Abstract

Molar ratio CO/CO2 can be used for estimating burning particle temperature without the use of heat balance procedures. Its estimation, using Arthur's equation for primary CO/CO2 ratio and Howard's equation for homogeneous combustion rate of CO, is described in the paper. In the batch char combustion experiments different values of CO/CO2 ratio were measured in flue gases, and it depended on bed temperature, coal type and particle size. Obtained differences between bed and burning particle temperature ranged from 20 up to 300 K. Results imply that there is a considerable discrepancy between real and calculated particle temperature using well known heat transfer relations. The main cause for this discrepancy seems to lay in internal and boundary layer particle combustion, which are ignored in commonly used relations for heat transfer.