Full‐field PIV/DIA and local concentration measurements of ozone decomposition in riser‐flow

A.E. Carlos Varas, E.A.J.F. Peters (Corresponding author), J.A.M. Kuipers

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

A full‐field PIV‐DIA technique has been coupled to concentration measurements in order to characterize the riser performance at different gas superficial velocities and reaction rates for ozone decomposition. Experiments under riser flow conditions were performed with the use of a compact pseudo‐2D lab‐scale riser reactor. The purpose of this work is to generate reliable experimental data to validate computational models for mass transfer in riser flow conditions. The catalytic activity of the particles was characterized. To analyze the reaction rate effect over the performance of a riser reactor, two catalyst batches with different activities were used and their kinetics were measured. The hydrodynamics of the gas‐solid flow was determined using the PIV‐DIA technique. Particle clusters were identified and characterized. By correlating the cluster information and mass concentration measurements, it was shown that a higher frequency of local flow heterogeneities near the walls led to higher conversion rates than in the core of the riser. Reaction rate and gas superficial effects are analyzed.
Original languageEnglish
Pages (from-to)1616-1626
Number of pages11
JournalThe Canadian Journal of Chemical Engineering
Volume99
Issue number7
Early online date3 Dec 2020
DOIs
Publication statusPublished - Jul 2021

Keywords

  • circulating fluidized bed
  • fast fluidization
  • ozone
  • particle-clusters
  • riser reactor

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