Les lits bactériens : de l'application à la recherche

Conference (1995)

Analysis of liquid flow distribution in trickle bed reactor using computer assisted tomography

in Beck, M. S.; Hoyle, B. S.; Morris, M. A. (Eds.) et al Process tomography - 1995 - Implementation for industrial processes (1995)

Analysis of Liquid Flow Distribution in Trickling Flow Reactor Using Computer-Assisted X-Ray Tomography

in Chemical Engineering Research & Design : Transactions of the Institution of Chemical Engineers Part A (1995), 73(A3), 258-262

In this paper, we propose a new experimental technique, based on X-ray tomography, allowing the analysis of the gas-liquid-solid phase distribution in trickling flow reactors. Tomography refers to the ... [more ▼]

In this paper, we propose a new experimental technique, based on X-ray tomography, allowing the analysis of the gas-liquid-solid phase distribution in trickling flow reactors. Tomography refers to the cross-sectional imaging of an object from data collected by illuminating this object from many directions. The experimental set-up allows the scanning of transverse sections of rather large columns: up to 0.8 m diameter and 2 m height can be irradiated. Experiments were carried out both without and with liquid flow. In the absence of liquid, the reconstructed images give a view of the non-uniformity of the solid phase distribution. The images obtained are very complex because they result from the superposition of several distributions with different Spatial scales. We show the existence of a first spatial scale which allows us to separate properties belonging to the individual packing elements from those belonging to the bed scale. When liquid is flowing through the packed bed X-ray scans give a clear picture of the distribution of the liquid phase saturation, despite the very low liquid film thickness. Average values of this liquid phase saturation are determined and confronted with a partial wetting model. [less ▲]

Trickle flow in packed columns : new experimental and theoretical investigations

in Trends in Chemical Engineering (1994), 2

The use of large scale computer assisted tomography for the study of hydrodynamics in trickling filters

in Chemical Engineering Science (1994), 49(24B), 5271-5280

In this paper, a new experimental technique is proposed, based on X-ray tomography, allowing the analysis of the gas-liquid-solid phase distribution in trickling filters. Tomography refers to the cross ... [more ▼]

In this paper, a new experimental technique is proposed, based on X-ray tomography, allowing the analysis of the gas-liquid-solid phase distribution in trickling filters. Tomography refers to the cross-sectional imaging of an object from data collected by illuminating this object from many directions. The experimental set-up allows the scanning of transverse sections of rather large filters: up to 0.8 m diameter and 2 m height can be irradiated. Experiments were carried out both without and with liquid flow. In the absence of liquid, the reconstructed images give a view of the non-uniformity of the solid phase distribution. The images obtained are very complex because they result from the superposition of several distributions with different spatial scales. The existence of a first spatial scale is shown which allows separation of the properties belonging to the individual packing elements from those belonging to the bed scale. When liquid is flowing through the packed bed, the distribution of the liquid hold-up is clearly evidenced, despite the very low liquid film thickness. [less ▲]

The use of differential pressure transducer in the study of flow patterns in a trickle-bed reactor

Poster (1993)

Récupération du cadmium dans les eaux usées par carbonatation biologique

in Jallut, C. (Ed.) Récents Progrès en Génie des procédés - N°30 - Etude et Conception d'Equipements - Actes du 4ème Congrès français de Génie des Procédés, 21-23 septembre 1993, Grenoble, France (1993)

Le traitement des eaux industrielles chargées en métaux lourds. Situation actuelle et perspectives de développement

in Tribune de l'Eau (La) (1993), 561

Rational descriptionthe trickle flow through packed beds. Part I : Liquid distribution far form the distributer

in Chemical Engineering (1992), 48

Statistical hydrodynamics in trickle flow columns

in AIChE Journal (1992), 38