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- W1981019864 abstract "Catalyst carrier beads used in the oil industry experience various kinds of breakage during their residence time in reactors. These beads are highly porous in order to have a large surface area and contain macropores to enhance the transport of the reagents within the beads. However, high porosity and the presence of macropores weaken the beads, and therefore an optimisation of these parameters is highly desirable. In order to analyse the influence of these macropores on the particle strength, the behaviour of the beads under quasi-static compressive loading has been analysed and compared for three samples with different macroporosities. The distributions of the single particle crushing strength and Young's modulus have been obtained for each sample. The numerical technique of distinct element analysis (DEA) has been applied to analyse the bulk crushing strength (BCS) of each sample. The BCS of one of the samples has also been determined experimentally and the results are compared with the predictions from DEA in an attempt to relate the bulk behaviour to the single particle characteristics in order to ultimately optimise the production of the beads. Les billes d'alumine utilisées dans l'industrie pétrolière subissent des dommages variés lors de leur séjour dans les réacteurs. Ces billes sont très poreuses et contiennent des macropores permettant d'améliorer le transport des réactifs à l'intérieur de la bille. Cependant, une porosité élevée et la présence de macropores peuvent diminuer la résistance des billes et donc une optimisation de ces propriétés est nécessaire. Afin d'étudier l'influence des macropores sur la résistance à la rupture, trois échantillons à macroporosité variable ont été testés selon un mode de chargement quasi-statique. Pour chaque échantillon, les distributions de la force de rupture et du module d'élasticité ont ainsi été obtenues. La méthode numérique des éléments distincts a été appliquée à chaque échantillon pour tenter de relier la résistance individuelle des particules à leur resistance en lit afin de finalement optimiser la production des billes. Pour un échantillon, les résultats obtenus par simulation sont comparés à ceux obtenus expérimentalement par le test d'écrasement en lit." @default.
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- W1981019864 date "1999-11-01" @default.
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- W1981019864 title "Breakage of macroporous alumina beads under compressive loading: simulation and experimental validation" @default.
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- W1981019864 doi "https://doi.org/10.1016/s0032-5910(99)00118-7" @default.
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