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Methodology of mechanical characterization of coated spherical materials

Ould-Chikh, Samy and Celse, Benoit and Hemati, Mehrdji and Rouleau, Loïc Methodology of mechanical characterization of coated spherical materials. (2008) Powder Technology . ISSN 0032-5910

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Official URL: http://dx.doi.org/10.1016/j.powtec.2008.04.073

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.

Item Type:Article
Additional Information:Article in Press.Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Powder Technology website : http://www.sciencedirect.com/science/journal/00325910
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > IFP Energies Nouvelles - IFPEN (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Réaction, mélange & séparation (RMS)
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Deposited By: Hélène Dubernard

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