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Experimental study on the shrinkage characteristics and devolatilization time of wood in a turbulent fluidized bed combustor using computed tomography

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  • Fang, Dong-dong
  • Chen, Jia
  • Zhang, Li-hui
  • Duan, Feng
  • Wang, Ping
  • Chyang, Chien-Song

Abstract

Computed tomography (CT) was used to scan the samples obtained from devolatilization in a turbulent fluidized bed combustor (FBC). The evolution of three-dimensional shrinkages at different residence time was measured and visualized successfully without destroying the sample. The effects of the bed temperature, and the fuel species on the mass conversion, devolatilization time, and shrinkage characteristics were also investigated. Four common Chinese wood types, poplar, Chinese fir, oak, and teak were used. The results show that the shrinkage and mass conversion increase with increasing residence time. In addition, the devolatilization time and final tangential and radial shrinkages decrease with increasing bed temperature. The final longitudinal shrinkage shows an inverse trend compared with the other two shrinkages. The tangential shrinkage is slightly greater than the radial shrinkage and much greater than the longitudinal shrinkage for all tests. Poplar wood as a kind of cork, which has the highest volatile matter content among the four woods, showed the maximum final shrinkages.

Suggested Citation

  • Fang, Dong-dong & Chen, Jia & Zhang, Li-hui & Duan, Feng & Wang, Ping & Chyang, Chien-Song, 2017. "Experimental study on the shrinkage characteristics and devolatilization time of wood in a turbulent fluidized bed combustor using computed tomography," Energy, Elsevier, vol. 141(C), pages 348-357.
    • Handle: RePEc:eee:energy:v:141:y:2017:i:c:p:348-357
    DOI: 10.1016/j.energy.2017.09.104
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    References listed on IDEAS

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    1. Duan, Feng & Liu, Jian & Chyang, Chien-Song & Hu, Chun-Hsuan & Tso, Jim, 2013. "Combustion behavior and pollutant emission characteristics of RDF (refuse derived fuel) and sawdust in a vortexing fluidized bed combustor," Energy, Elsevier, vol. 57(C), pages 421-426.
    2. Wenjia Jin & Kaushlendra Singh & John Zondlo, 2013. "Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method," Agriculture, MDPI, vol. 3(1), pages 1-21, January.
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    Cited by:

    1. Salmasi, A. & Shams, M. & Chernoray, V., 2018. "An experimental approach to thermochemical conversion of a fuel particle in a fluidized bed," Applied Energy, Elsevier, vol. 228(C), pages 524-534.

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