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Numerical and experimental investigation on air distributor design of fluidized bed reactor of sawdust pyrolysis

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  • Bello, Yusuf H.
  • Ahmed, Mahmoud A.
  • Ookawara, Shinichi
  • Elwardany, Ahmed E.

Abstract

An improved biomass conversion in a lab-scale fluidized bed reactor (FBR) is achieved by optimizing the air distributor orifice size and number. Two approaches for introducing air were numerically and experimentally examined. These included perforated plate and downward orifice sparger. 3 mm and 5 mm orifice diameters, and 7, 9 and 13 holes were simulated at flow velocities of 2, 4, 6, and 8 times the minimum fluidization velocity, Umf. The simulation results revealed that increasing the orifice number has a positive effect on gas holdup, particularly for the perforated plate, which showed a uniform distribution of bubbles. The sparger configuration produced larger bubbles sizes, which could lead to better recirculation of solid flux, while stagnant particle zones were observed at the lower section of both distributors.

Suggested Citation

  • Bello, Yusuf H. & Ahmed, Mahmoud A. & Ookawara, Shinichi & Elwardany, Ahmed E., 2022. "Numerical and experimental investigation on air distributor design of fluidized bed reactor of sawdust pyrolysis," Energy, Elsevier, vol. 239(PC).
    • Handle: RePEc:eee:energy:v:239:y:2022:i:pc:s0360544221024270
    DOI: 10.1016/j.energy.2021.122179
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    References listed on IDEAS

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