Article
Engineering, Chemical
Julia Picabea, Mauricio Maestri, Miryan Cassanello, Gabriel Salierno, Cataldo De Blasio, Maria Angelica Cardona, Daniel Hojman, Hector Somacal
Summary: The study focused on implementing time series analysis tools to validate LSFB modeling, showing that the simulation can capture LSFB behavior. Trends of solid dispersion coefficients and mixing times predicted by the simulation are in good agreement with the experiments.
Article
Engineering, Multidisciplinary
Fria Hossein, Massimiliano Materazzi, Matteo Errigo, Panagiota Angeli, Paola Lettieri
Summary: This paper describes the application of ultrasound techniques in solid-liquid fluidized beds, including the measurement of velocity profiles, particle size distribution, and solids volume fraction. The results indicate that ultrasound techniques are important for real-time characterization of highly concentrated solid-liquid systems.
Article
Engineering, Chemical
Anna Kohler, Diana Carolina Guio-Perez, Anna Prati, Michele Larcher, David Pallares
Summary: This study focused on the motion trajectory and drag behavior of solid particles in gas-fluidized beds, revealing the complex rheological characteristics of bed emulsions and their effects on particles. It also discovered the viscoplastic behavior of bed emulsions and their clear dependence on the size and density of tracers.
Article
Engineering, Chemical
Haifeng Wang, Yanpei Chen, Wei Wang
Summary: Studying clusters in fluidized beds reveals their dynamic characteristics in both temporal evolution and time-averaged behaviors, including power-law distribution of cluster sizes, simplified coalescence process, and breakup linked to increasing torque.
Article
Engineering, Chemical
Renshuai Zhu, Yanpei Chen, Wei Wang
Summary: Through a particle-level experiment, it was found that various banded structures exist in a bubbling fluidized bed, indicating a violation of local equilibrium. These structures involve stretching, compression, or shearing between particles. Non-Gaussian velocity distributions were found throughout the bed. The nonequilibrium characteristic will serve as a criterion for assessing different models of bubbling fluidized beds in future research.
Article
Engineering, Chemical
Tolu Emiola-Sadiq, Jiachen Wang, Lifeng Zhang, Ajay Dalai
Summary: This study experimentally investigated the mixing and segregation of binary mixtures involving biomass materials in a fluidized bed, focusing on the axial and radial distribution of biomass particles. Results showed that increasing fluidizing velocity improved mixing extent, while the mixing index decreased beyond a certain biomass loading threshold.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Engineering, Chemical
Bo Lv, Xiaowei Deng, Juntao Chen, Chaojun Fang, Xiangnan Zhu
Summary: The use of sound fields was found to improve the stability and fluidization characteristics of fine coal beds, increasing the efficiency of density segregation and dry beneficiation processes for fine coal. Introducing a sound field eliminated large bubbles and expanded the gas velocity range for efficient segregation, resulting in successful separation of fine coal in a sound-assisted fluidized bed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Thermodynamics
Hanyu Jin, Qiang Wu, Shuai Wang, Yurong He
Summary: In this study, the mass and heat transfer behaviors of ellipsoid wet particles in a fluidized bed dryer were investigated using the CFD-DEM method. The heat transfer mechanisms caused by contact, convection, and liquid bridge were analyzed. The study found that a reduction in liquid content weakens the heat flow between particles, and the agglomeration of non-spherical particles during the drying process leads to a lower drying rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Engineering, Chemical
Jia Wei Chew, W. Casey Q. LaMarche, Ray A. Cocco
Summary: As we celebrate the 100th anniversary of the commercialization of the fluidized bed reactor, it is evident that fluidized bed technology has undergone significant advancements in the past century. With the development of sophisticated models, experimentation techniques, and statistical tools, as well as the utilization of computational platforms and AI, the application of fluidized bed technology is expected to become more cost-effective and efficient.
Article
Energy & Fuels
Syed Sadiq Ali, Agus Arsad, Mohammad Asif
Summary: This study investigated the hydrodynamics of ultrafine nanopowders by modifying the inlet flow and using an improved dual drainage strategy. The results showed that these methods helped to suppress size-based segregation of agglomerates, leading to faster and smoother bed collapse.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Engineering, Chemical
Cedric Briens, Muhammad O. Bhatti, Francisco J. Sanchez, Franco Berruti, Jennifer McMillan
Summary: This study focused on understanding how agglomerates move through a fluidized bed to improve Fluid Cokers and minimize operating problems. Experimental methods included injecting a binder solution and developing a new radioactive particle tracking method. Results showed that increasing fluidization velocity reduced segregation and larger agglomerates were more likely to segregate. Establishing an asymmetric flow pattern greatly reduced agglomerate segregation by correlating bubble flow patterns.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Isik Sena Akgun, Can Erkey
Summary: The study characterized fluidization regimes for alginate aerogel particles in a Wurster fluidized bed, revealing minimum fluidization, bubbling, pneumatic, horizontal circular motion, and circulatory particle motion regimes. Factors such as particle size, batch volume, tube size, plate geometry, and gap height were found to influence the boundaries of each fluidization regime.
Article
Engineering, Chemical
C. J. McIntyre, R. W. Hughes, A. Macchi, P. Mehrani
Summary: The hydrodynamics of ilmenite particles in a high pressure cylindrical fluidized bed were modeled using the multiphase particle-in-cell approach. The model was validated against experimental data and showed good agreement for the minimum fluidization velocity at a close pack factor of 0.58. The model accurately represented the trends in bed expansion with fluidization ratio and pressure, but consistently underestimated the values. Bubble size distribution was also predicted by the model, with some deviation from experimental results. The importance of this study lies in its contribution to understanding the hydrodynamics of ilmenite particles in fluidized bed reactors.
Article
Engineering, Chemical
Sangram Roy, Harish Jagat Pant, Shantanu Roy
Summary: This study investigates the velocity distributions in a binary fluidized bed of glass beads and reveals the impact of bed compositions on solid particle velocities. The results show changes in mean velocity and fluctuation of solid particles with varying fractions, providing valuable insights for further research on flow dynamics.
CHEMICAL ENGINEERING SCIENCE
(2021)
