ORBi: Léonard Angélique - Image analysis of X-ray microtomograms of soft materials during convective drying: 3D measurements

Reference : Image analysis of X-ray microtomograms of soft materials during convective drying: 3D me...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Chemical engineering Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/5498

Title :	Image analysis of X-ray microtomograms of soft materials during convective drying: 3D measurements
Language :	English
Alternative title :	[fr] Analyse d'images obtenues par rmicrotomographie à rayons X lors du séchage convectif de matériaux déformables : mesures 3D
Author, co-author :	Léonard, Angélique [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée >]
	Blacher, Silvia [Université de Liège - ULg > Département de chimie appliquée > Labo de génie chimique > >]
	Marchot, Pierre [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
	Pirard, Jean-Paul [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
	Crine, Michel [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Publication date :	Jun-2005
Journal title :	Journal of Microscopy-Oxford
Publisher :	Blackwell Publishing
Volume :	218
Issue/season :	Pt 3
Pages :	247-252
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0022-2720
City :	Oxford
Keywords :	[en] 3D image analysis ; crack ; drying ; sludge ; X-ray microtomography ; texture
Abstract :	[en] Drying dewatered sludge leads to a complex three-dimensional porous structure. Moreover, this operation is dependent on the way the material is processed. In this study, textural changes of sludge extrudates submitted to convective drying are followed by a 3D image analysis of reconstructed X-ray microtomograms. To achieve this goal, two different wastewater sludges collected in wastewater treatment plant after the thickening step and dewatered in the laboratory are used. It is showed that the evolution of the 3D-crack ratio vs. the residual water content evolves following a hyperbolic law. The 3D opening crack size distribution reveals two different types of pore development, i.e. a continuous pore size evolution for one sludge and the sudden appearance of cracks for the other sludge.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Permalink :	http://hdl.handle.net/2268/5498
DOI :	10.1111/j.1365-2818.2005.01485.x

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