References of "Léonard, Angélique"
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See detailCarbon xerogels as catalyst supports
Job, Nathalie ULg; Léonard, Angélique ULg; Lambert, Stéphanie ULg et al

Poster (2007, August)

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See detailWater desorption isotherms of resorcinol-formaldehyde and carbon xerogels
Léonard, Angélique ULg; Escalona, I.; Job, Nathalie ULg et al

Poster (2007, July 15)

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See detailWater desorption isotherms of resorcinol-formaldehyde and carbon xerogels
Léonard, Angélique ULg; Escalona, Ivonne; Job, Nathalie ULg et al

in The American Carbon Society (Ed.) Proceedings of Carbon 2007 (2007, July)

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See detailRe-evaporation of adsorbed (toxic) compounds inside an activated carbon filter
Léonard, Angélique ULg; Blacher, Silvia ULg; Wullens, Hilda et al

in The American Carbon Society (Ed.) Proceedings of Carbon 2007 (2007, July)

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See detailMesure de la distribution des phases dans une mousse métallique par radiographie et micro-tomographie à rayons X
Toye, Dominique ULg; Aferka, Saïd ULg; Calvo, Sébastien ULg et al

in Récents Progrès en Génie des Procédés - N°95 - Actes des 5èmes Journées francophones sur les réacteurs gaz-liquide et gaz-liquide-solide, 12-15 juin 2007, Carry-le-Rouet, France (2007, June)

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See detailEffect of sample size on the mechanical stresses induced during the convective drying of highly shrinking materials
Léonard, Angélique ULg; Crine, Michel ULg; Jomaa, Wahbi

in Proceedings of the joint conference of AFSIA and Drying Working group of EFCE at Casino Municipal Biarritz, France, 24th and 25th May, 2007 (2007, May)

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See detailCharacterization of dried banana chips quality by X-ray µ-CT
Léonard, Angélique ULg; Nimmol, Chatchai; Blacher, Silvia ULg et al

Conference (2007, April)

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See detailNon-destructive characterization of deer (Cervus Elaphus) antlers by X-ray microtomography coupled with image analysis
Léonard, Angélique ULg; Guiot, L. P.; Pirard, Jean-Paul ULg et al

in Journal of Microscopy-Oxford (2007), 225(Pt 3), 258-263

X-ray microtomography coupled with image analysis was tested as a non-destructive alternative method for the textural characterization of the trabecular part of deer antlers (Cervus Elaphus). As gas ... [more ▼]

X-ray microtomography coupled with image analysis was tested as a non-destructive alternative method for the textural characterization of the trabecular part of deer antlers (Cervus Elaphus). As gas adsorption and mercury intrusion cannot be applied on this soft and spongy material, its pore texture was, up to now, determined from histological sections that give only two-dimensional information. In this work, X-ray microtomography is used to scan entire or half pieces of antlers and three-dimensional image analysis is performed in order to assess the differences between samples collected at various antler locations. Results clearly show a porosity profile along the sample diameter. The pore size distribution is showed to be dependent on the sample original site. [less ▲]

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See detailRheological determination of the sol-gel transition during the aqueous synthesis of resorcinol-formaldehyde resins
Job, Nathalie ULg; Panariello, Fabian; Crine, Michel ULg et al

in Colloids and Surfaces A : Physicochemical and Engineering Aspects (2007), 293(1-3), 224-228

The sol-gel transition of organic gels prepared by polycondensation of resorcinol (R) with formaldehyde (F) in presence of sodium carbonate (C) was monitored by small amplitude oscillatory measurements ... [more ▼]

The sol-gel transition of organic gels prepared by polycondensation of resorcinol (R) with formaldehyde (F) in presence of sodium carbonate (C) was monitored by small amplitude oscillatory measurements, at a single frequency. The gelation time (t(g)) was determined from the evolution of the storage (G) and loss (G") moduli versus time. The influence of two synthesis variables, the resorcinol/sodium carbonate ratio (R/C) and the synthesis temperature (7), was investigated. The gelation time was found to decrease with increasing synthesis temperature and decreasing R/C ratio. The apparent activation energy of the reactional system leading to the gelation, calculated from the gelation times obtained between 50 and 90 degrees C, was found to be close to 80 kJ mol(-1) and independent of the R/C ratio. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detail3D image analysis characterization of dried banana
Léonard, Angélique ULg; Devahastin, Sakamon; Blacher, Silvia ULg

Conference (2007, February)

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See detailPhase distribution measurements in metallic foam using x-ray radiography and micro-tomography
Toye, Dominique ULg; Aferka, Saïd ULg; Calvo, Sébastien ULg et al

in Johansen, G. A.; Mc Cann, H. (Eds.) Proceedings of the 5th World Congress on Industrial Process Tomography, Bergen, Norway, September 6-9, 2007 (CD-ROM) (2007)

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See detailCharacterization of dried banana porous structure by X-ray microtomography coupled with image analysis
Léonard, Angélique ULg; Blacher, Silvia ULg; Devahastin, Sakamon

in Chen, Guohua (Ed.) The proceedings of the 5th Asia-Pacific Drying Conference, Hong Kong, 13 – 15 August 2007, Vol. 1 (2007)

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See detailApplication des techniques tomographiques en génie des procédés
Léonard, Angélique ULg; Toye, Dominique ULg; Marchot, Pierre ULg et al

Scientific conference (2006, October 26)

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See detailTowards the production of carbon xerogel monoliths by optimizing convective drying conditions
Job, Nathalie ULg; Sabatier, Françoise; Pirard, Jean-Paul ULg et al

in Carbon (2006), 44(12), 2534-2542

Resorcinol-formaldehyde hydrogels prepared at various resorcinol/sodium carbonate ratios, R/C, were convectively air dried. The influence of the drying operating conditions, i.e. air temperature and ... [more ▼]

Resorcinol-formaldehyde hydrogels prepared at various resorcinol/sodium carbonate ratios, R/C, were convectively air dried. The influence of the drying operating conditions, i.e. air temperature and velocity, on the pore texture, shrinkage and cracking of the dried gels were investigated. Shrinkage was found to be isotropic. The shrinkage behaviour and the textural properties of the gels are independent of the drying operating conditions, but are completely determined by the value of the synthesis variables. The analysis of the drying kinetics shows two main drying periods. During the first phase, shrinkage occurs and the external surface of the material remains completely wet: heat and mass transfers are limited by external resistances located in a boundary layer. When shrinkage stops, the second period begins: the evaporation front recedes inside the solid and internal transfer limitations prevail. The drying time can be reduced by increasing the air temperature and/or velocity, but the temperature increase is limited when monolithicity is required, especially when the pores are small. For example, at a temperature of 160 degrees C and a velocity of 2 m/s, about 1 h is needed to dry a 2.8 cm in diameter and 1 cm in height cylinder containing macropores (pore width > 50 nm after drying). The same cylinder presenting small mesopores (pore width = 10-15 nm after drying) requires 20 h at 30 degrees C and 2 m/s to reach complete dryness without the development of cracks. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailStudy of organic and water vapours adsorption on carbon filters by X-ray microtomography
Léonard, Angélique ULg; Blacher, Silvia ULg; Marchot, Pierre ULg et al

in Fourth International Symposium on Process Tomography in Poland, 2006, Varsóvia (2006, September)

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