Methodology of mechanical characterization of coated spherical materials

Samy Ould-Chikh*, Benoit Celse, Mehrdji Hemati, Loïc Rouleau

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The aim of this work was to develop a methodology for the mechanical characterization of catalyst beads with a core-shell structure and more especially for coated spherical granules. Supports composed of an alpha alumina core coated by gamma alumina shell were shaped by pan coating to this purpose. The proposed methodology started with the characterization of the microstructure of the coating and the highlight of potential macro defects within. Thereafter three tests simulating mechanical stress, such as impact, compression (bulk crushing test), and shear (drum attrition test) are used. The operational parameters of these tests were also optimised in order to stress preferentially the shell of the coated materials. Among the evaluated tests, drum attrition seems to be most efficient for characterizing coated spherical granules.

Original languageEnglish (US)
Pages (from-to)19-24
Number of pages6
JournalPowder Technology
Volume190
Issue number1-2
DOIs
StatePublished - Mar 5 2009

Keywords

  • Alumina
  • Attrition
  • Coating
  • Granulation
  • Mechanical characterization

ASJC Scopus subject areas

  • Chemical Engineering(all)

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