CIESC Journal ›› 2014, Vol. 65 ›› Issue (9): 3592-3598.doi: 10.3969/j.issn.0438-1157.2014.09.038

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Numerical simulation of coal pyrolysis using FD model

YU Junwu, CHEN Yongli, HE Rong, ZHANG Yanguo   

  1. Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
  • Received:2014-01-06 Revised:2014-04-04 Online:2014-09-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21376134).

Abstract: For numerical simulation of coal pyrolysis using the fragmentation and diffusionn (FD) model, a numerical method was proposed. The pyrolysis of three kinds of coal in a heated-tube reactor was simulated respectively, and the results were compared with the experimental results and also with the numerical results of FG-DVC model and CPD model. The effect of pyrolysis temperature and particle diameter on coal pyrolysis product was also studied. The accuracy of FD model was higher than FG-DVC model and CPD model, proving that FD model was more applicable for numerical simulation of coal pyrolysis. The gas product increased rapidly by increasing pyrolysis temperature until 1373 K, and then was nearly constant when pyrolysis temperature was higher than 1373 K. The tar product decreased with increasing pyrolysis temperature, and less time was needed to reach the maximum tar amount. The gas product and tar product both decreased by increasing particle diameter of coal, while more time was needed to reach the maximum tar amount.

Key words: coal, pyrolysis, model, numerical simulation, Euler-Lagrangian method

CLC Number: 

  • TK16
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