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Mathematical Modeling and Pointwise Validation of a Spouted Bed Using an Enhanced Bed Elasticity Approach

Author

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  • Sebastián Uribe

    (Chemical and Biochemical Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA)

  • Binbin Qi

    (Chemical and Biochemical Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA)

  • Omar Farid

    (Chemical and Biochemical Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA)

  • Muthanna Al-Dahhan

    (Chemical and Biochemical Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA
    Mining and Nuclear Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA)

Abstract

With a Euler–Euler (E2P) approach, a mathematical model for predicting the pointwise hydrodynamic behavior of a spouted bed was implemented though computational fluid dynamics (CFD) techniques. The model considered a bed elasticity approach in order to reduce the number of required sub-models to provide closure for the solids stress strain-tensor. However, no modulus of elasticity sub-model for a bed elasticity approach has been developed for spouted beds, and thus, large deviations in the predictions are obtained with common sub-models reported in literature. To overcome such a limitation, a new modulus of elasticity based on a sensitivity analysis was developed and implemented on the E2P model. The model predictions were locally validated against experimental measurements obtained in previous studies. The experimental studies were conducted using our in-house developed advanced γ-ray computed tomography (CT) technique, which allows to obtain the cross-sectional time-averaged solids holdup distribution. When comparing the model predictions against the experimental measurements, a high predictive quality for the radial solids holdup distribution in the spout and annulus regions is observed. The model predicts most of the experimental measurements for different particle diameters, different static bed heights, and different inlet velocities with deviations under 15%, with average absolute relative errors (AARE) between 5.75% and 7.26%, and mean squared deviations (MSD) between 0.11% and 0.24%

Suggested Citation

  • Sebastián Uribe & Binbin Qi & Omar Farid & Muthanna Al-Dahhan, 2020. "Mathematical Modeling and Pointwise Validation of a Spouted Bed Using an Enhanced Bed Elasticity Approach," Energies, MDPI, vol. 13(18), pages 1-22, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4738-:d:412085
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    References listed on IDEAS

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    1. Cristina Moliner & Filippo Marchelli & Barbara Bosio & Elisabetta Arato, 2017. "Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up," Energies, MDPI, vol. 10(11), pages 1-39, October.
    2. Cortazar, M. & Lopez, G. & Alvarez, J. & Amutio, M. & Bilbao, J. & Olazar, M., 2018. "Advantages of confining the fountain in a conical spouted bed reactor for biomass steam gasification," Energy, Elsevier, vol. 153(C), pages 455-463.
    3. Aguado, Roberto & Saldarriaga, Juan F. & Atxutegi, Aitor & Bilbao, Javier & Olazar, Martin, 2019. "Influence of the kinetic scheme and heat balance on the modelling of biomass combustion in a conical spouted bed," Energy, Elsevier, vol. 175(C), pages 758-767.
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