Assessment of Global and Network Models of Devolatilization for Numerical Analysis of Pulverized Coal Combustion

ABSTRACT

Mathematical modeling of devolatilization plays a significant role in the prediction of flame development in solid fuel combustion simulations. Commonly implemented devolatilization models available in the literature to simulate pulverized coal combustion are reviewed and evaluated. The effect of the particle heating rate on the onset of devolatilization and on final volatile yield is discussed. Selected devolatilization models are investigated with respect to their implementation in Computational Fluid dynamics (CFD) simulations of methane-assisted pulverized coal jet flame experiments. Differences in volatile release region, particle temperature and species concentration are presented and discussed with comparisons to the experimental data.

KEY WORDS:

• Pulverized coal combustion
• devolatilization models
• pyrolysis
• CFD modeling

Acknowledgments

The authors gratefully acknowledge the French Embassy in Turkey for the scholarship provided to Mr. Kapusuz for a joint PhD between the Marmara University and the University of Orléans. The authors also wish to express their gratitude to ICARE-CNRS in Orléans for hosting and for the provided technical support.

Disclosure statement

No potential conflict of interest was reported by the authors.