Development and confirmation of a simple procedure to measure solids distribution in fluidized beds using tracer particles

Yupeng Xu, Tingwen Li, Liqiang Lu, Xi Gao, Sina Tebianian, John R. Grace, Jamal Chaouki, Thomas W. Leadbeater, Rouzbeh Jafari, David J. Parker, Jonathan Seville, Naoko Ellis

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
157 Downloads (Pure)


The spatial distribution of solid particles is a key factor affecting the performance of fluidized bed reactors. Non-invasive techniques including radioactive particle tracking (RPT) and positron emission particle tracking (PEPT) are deployed to measure the solids distribution. Different methods to calibrate the particle tracking measurements have been developed to quantify mean solids concentration. In this paper, gas-solid flows in a traveling fluidized bed are simulated with CFD-DEM and the behavior of different particles, including bulk sand particles and tracer particles are investigated. The simulated hydrodynamics are compared with experimental measurements. Analyses are carried out to derive the mean solids concentration from the tracer particle data. Different calibration approaches are examined, and the simple calibration method is verified. It is shown that the mean solids concentration can be measured reliably using representative tracer particles. The experimental RPT data are then revisited with the new calibration method which yields more realistic results.
Original languageEnglish
Article number115501
Pages (from-to)1-11
Number of pages11
JournalChemical Engineering Science
Early online date21 Jan 2020
Publication statusPublished - 18 May 2020


  • Coarse grained method
  • Computational fluid dynamics
  • Particle tracking
  • Solids volume fraction
  • Tracer particles
  • Traveling fluidized bed

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering


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