Analysis of hematite attrition in a grid jet apparatus

Samuel C. Bayham, Nathan L. Galinsky, Bryan Hughes, Xiaoyang Wei

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

Particulate attrition is of interest for novel carbon-capture processes such as chemical looping combustion because the makeup cost of oxygen carrier is a significant portion of operating cost. Thus, models to study and predict attrition of various oxygen carriers in fluidized bed systems are being developed. One of the regions of concern in fluidized bed systems is the high-velocity jet region near gas distributors in a fluid bed. This work studies the attrition of hematite particles using a modified ASTM apparatus to measure the particle size distribution throughout the experiment. Bed weight and gas velocity were varied. Hematite particles above the corresponding threshold value had a severe variation of particle size distributions which decreased with time. Weight fractions of the sieves over time were fit to a linear, time-variant population balance model to offer insight into particle attrition. The first-order rate constant was modified as a decaying exponential.

Original languageEnglish
Pages (from-to)377-384
Number of pages8
JournalPowder Technology
Volume380
DOIs
Publication statusPublished - Mar 2021
Externally publishedYes

Keywords

  • Abrasion
  • Attrition
  • Chemical looping
  • Fragmentation
  • Hematite
  • Population balance
  • Powder

ASJC Scopus subject areas

  • Chemical Engineering (all)

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