The effect of fuel pyrolysis on the coal particle combustion - An analytical investigation

Mostafa Baghsheikhi, Alireza Rahbari*, Seyed Mehdi Ashrafizadeh, Mehdi Bidabadi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The aim of this work is to analytically investigate the symmetrical combustion of an isolated coal particle with the fuel pyrolysis effect. The modelling concept of coal particles is similar to that of the liquid droplet combustion but in the case of coal devolatilization, the particles do not shrink like droplet does due to evaporation of liquid fuel. The rate of devolatilization of volatiles can be calculated using the equation that is similar to Arrhenius equation. This model is based on an assumption of combined quasi-steady and transient behaviour of the process and especially focuses on predicting the variations of temperature profile, radius of pyrolysis and transfer number. It is revealed that the entrance of pyrolysis effect into the governing equations leads to the reduction in the film radius and consequently a reduction in the stand-off ratio and transfer number.

Original languageEnglish
Pages (from-to)279-289
Number of pages11
JournalThermal Science
Volume20
Issue number1
DOIs
Publication statusPublished - 2016
Externally publishedYes

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