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Analysis of gas flow behavior in an annular fluidized-bed reactor for polystyrene waste treatment

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Abstract

The characteristics of bubble properties and the chaotic flow behavior of gas were investigated in an annular fluidized bed (0.102 m in inner diameter and 2 m in height) because the behavior of gas flow in such a reactor is one of the important factors governing reactor operation, reactor performance, and the reaction itself. Pressure fluctuations as a state variable for the analysis of gas flow behavior were measured and analyzed. Bubble properties were determined by adopting the cross-correlation function of pressure fluctuations. The resultant chaotic flow behavior of gas was interpreted by means of chaotic parameters such as the Kolmogorov entropy. It was found that the Kolmogorov entropy could be utilized effectively to explain the nonlinear dynamic behavior of gas-solid flow in the annular fluidized bed. The pierced length and rising velocity of bubbles increased with increasing gas velocity, bed temperature, and particle size of the bed material. The bubble frequency increased with increasing gas velocity and bed temperature, while it decreased with increasing particle size of the bed material. Correlations to predict the bubble properties in annular fluidized-bed reactors were suggested.

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Authors and Affiliations

  1. School of Chemical Engineering, Chungnam National University, Daeduk Science Town, Daejeon, 305-764, Korea

    Sung Mo Son, Uk Yeong Kim, Ik Sang Shin & Yong Kang

  2. Alternative Chemicals/Fuel Research Center, Daejeon, Korea

    Suk Hwan Kang

  3. Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology, Daejeon, Korea

    Byung Tae Yoon & Myung Jae Choi

Authors
  1. Sung Mo Son
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  2. Uk Yeong Kim
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  3. Ik Sang Shin
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  4. Yong Kang
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  5. Suk Hwan Kang
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  6. Byung Tae Yoon
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  7. Myung Jae Choi
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Correspondence to Yong Kang.

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Son, S.M., Kim, U.Y., Shin, I.S. et al. Analysis of gas flow behavior in an annular fluidized-bed reactor for polystyrene waste treatment. J Mater Cycles Waste Manag 11, 138–143 (2009). https://doi.org/10.1007/s10163-008-0226-0

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  • DOI: https://doi.org/10.1007/s10163-008-0226-0

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