Modeling changes of fractal pore structures in coal pyrolysis

Coal pyrolysis processes are numerically investigated in mathematically produced coal pore models which simulate real coal pores in the parameters of the porosity and fractal dimension. The simulations include FG-DVC chemical reaction model, gas molecular diffusion in pores, energy conservation mode...

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Bibliographic Details
Published in:Fuel (Guildford) 2011-02, Vol.90 (2), p.499-504
Main Authors: Chen, Yongli, Wang, Xiaoliang, He, Rong
Format: Article
Language:English
Subjects:
Applied sciences
Coal
Combustion
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fractal
Fractal analysis
Fractals
Fuels
Mathematical models
Parents
Pore
Porosity
Pyrolysis
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Summary:Coal pyrolysis processes are numerically investigated in mathematically produced coal pore models which simulate real coal pores in the parameters of the porosity and fractal dimension. The simulations include FG-DVC chemical reaction model, gas molecular diffusion in pores, energy conservation model and coal swelling model. Numerical results are verified by experimental results qualitatively, and they revealed that both the porosity and volatile contents of the parent coal can affect the fractal dimension of the final char pores after pyrolysis linearly. A formula to predict the fractal dimension of char pores from its parent coal properties is obtained by curve fitting in numerous results.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2010.10.016