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Lookup NU author(s): Peter Asiedu-Boateng, Dr Jonathan McDonoughORCiD, Dr Vladimir ZivkovicORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Micro fluidized bed reactors (MFBRs) operating at high temperatures hold great potential for finding suitable conditions for kinetic screening experiments for CO2 capture sorbents. Additionally, high temperature hydrodynamics study using MFBRs prior to kinetics analysis could enable the acquisition of realistic and intrinsic kinetic data in transport phenomena-induced processes but the existence of wall effects could negatively impact quality of fluidization and cause delayed fluidization even though it may aid reaction kinetics. High temperature hydrodynamic studies in MFBRs remains relatively unexplored despite its enormous potential. In this work, we designed a high temperature MFBR system to perform detailed hydrodynamic experiments using pressure drop characterization approach to analyze the effect of temperature and bed-wall friction on various fluidization regimes with Geldart B limestone sorbents by controlling temperature with portable induction heater. Results show that minimum fluidization velocity decreases with increasing temperature for both Nauli and Oterpkolu limestones due to increased Van der waals forces and the cohesiveness between particles at elevated temperature; with the gradient of the decrease in minimum fluidization velocity being steeper between ambient temperature and 400 °C compared to the drop between 400 °C to 800 °C. At 600 °C, bubbles started appearing at air flow rate of (0.065 m/s) but bubbling started at (0.142 m/s) at 400 °C. Frequency spectra revealed that the superficial gas velocity at which a dominant frequency is attained (when slugging fluidization begins) reduces as the operating temperature increases. Additionally, bed pressure drop overshoot per volume of particle bed increases with increasing operating temperature.
Author(s): Asiedu-Boateng P, Asiedu NY, Patience GS, McDonough JR, Zivkovic V
Publication type: Article
Publication status: Published
Journal: Particuology
Year: 2026
Volume: 108
Pages: 156-167
Print publication date: 01/01/2026
Online publication date: 05/11/2025
Acceptance date: 23/10/2025
Date deposited: 30/10/2025
ISSN (print): 1674-2001
ISSN (electronic): 2210-4291
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.partic.2025.10.020
DOI: 10.1016/j.partic.2025.10.020
ePrints DOI: 10.57711/838s-fq09
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