[en] In order to preshape and mechanically strengthen, Pd-Ag/SiO2 xerogel catalysts were carried out in Al2O3 foams (pore-sizes similar to40 mum). The final material consists of a Pd-Ag/SiO2 xerogel immobilized in the open cells of the alumina foam. The localization of the xerogel catalyst in alumina foams of various pore structure was studied by X-ray microtomography. The three-dimensional (3D) porous structure was reconstructed from the consecutive cross-sections obtained by this technique. Total porosity, porous density distribution, and pore-size distribution were determined by image analysis on the free and impregnated supports. Our results show that the success of the used impregnation technique depends on the pore structure of the support. (C) 2004 Elsevier B.V. All rights reserved.
Disciplines :
Materials science & engineering Physics Chemical engineering Chemistry
Author, co-author :
Blacher, Silvia ; Université de Liège - ULiège > Département de chimie appliquée > Labo de génie chimique
Léonard, Angélique ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée
Heinrichs, Benoît ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Tcherkassova, Natalia ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Ferauche, Ferauche; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Crine, Michel ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires
Marchot, Pierre ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques
Loukine, E.; D. Mendeleev University of Chemical Technology of Russia
Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Language :
English
Title :
Image analysis of X-ray microtomograms of Pd-Ag/SiO2 xerogel catalysts supported on Al2O3 foams
Alternative titles :
[fr] Analyse d'images obtenues par microtomographie à rayons X d'un catalyseur de type xérogel Pd-Ag/SiO2 supporté sur une mousse de Al2O3
Publication date :
14 July 2004
Journal title :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
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Bibliography
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Léonard, A., Blacher, S., Marchot, P., Crine, M., (2002) Drying Tech., 20, p. 1053
Blacher, S., Maquet, V., Léonard, A., Chapelle, G., Crine, M., Jérôme, R., Pirard, J.-P., (2002) Characterizations of Porous Solids, 6, p. 331. , F. Rogriguez-Reinoso, B. McEnaney, J. Rouquerol, K. Unger (Eds.), Elsevier, Amsterdam
Sasov, A., Van Dyck, D., (1998) J. Microsc., 191, p. 151
Serra, J., (1982) Image Analysis and Mathematical Morphology, 1. , Academic Press, New York
Coster, M., Chermant, J.L., (1985) Précis d'Analyse d'Images, , CNRS, Paris
Otsu, N., (1979) IEEE Trans. Syst. Man Cybern., 9, p. 62
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