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Mass transfer coefficients between particles and liquids in a slurry bubble column and a three-phase fluidized bed containing small size particles were obtained with two mass transfer systems: (1) K f -N a + ion-exchange in cationexchange resin bead beds, including anion-exchange resin beads as inert particles; (2) zinc dissolution by HCI in zincplated glass bead beds, and in beds of non-plated glass beads. Operating parameters were gas velocity, liquid velocity, particle diameter, and particle concentration. The dependence of mass transfer coefficients on these parameters is discussed from the viewpoint of the energy supplied into the systems. Correlations of the experimental data using dimensionless groups are compared to previous correlations.Des coefficients de transfert de matitre entre particules et liquides dans une colonne ?I bulles de boues et un lit fluidis6 triphasique contenant des particules de petites tailles, ont Ct6 obtenus par deux systbmes de transfert de matitre:(1) I'Cchange d'ions K + -Na+ dans des lits de billes de resine cationique Cchangeuses d'ions, incluant des billes de resine Cchangeuses d'anions c o m e particules inertes; (2) la dissolution du zinc par du HCI dans des lits de billes de verre recouvertes de zinc et dans des lits de billes de verre non recouvertes. Les paramttres de fonctionnement sont la vitesse de gaz, la vitesse de liquide, le diamttre et la concentration des particules. La ddpendance des coefficients de transfert de matikre par rapport ?I ces paramttres est analysee du point de vue de I'energie apportCe dans les systkmes. Les corrClations des donnCes expckimentales utilisant des groupes adimensionnels sont comparCes ?I des corrClations antkrieures.Keywords: three-phase fluidized bed, slurry bubble column, particle-liquid mass transfer. lurry bubble columns and three-phase fluidized beds
Mass transfer coefficients between particles and liquids in a slurry bubble column and a three-phase fluidized bed containing small size particles were obtained with two mass transfer systems: (1) K f -N a + ion-exchange in cationexchange resin bead beds, including anion-exchange resin beads as inert particles; (2) zinc dissolution by HCI in zincplated glass bead beds, and in beds of non-plated glass beads. Operating parameters were gas velocity, liquid velocity, particle diameter, and particle concentration. The dependence of mass transfer coefficients on these parameters is discussed from the viewpoint of the energy supplied into the systems. Correlations of the experimental data using dimensionless groups are compared to previous correlations.Des coefficients de transfert de matitre entre particules et liquides dans une colonne ?I bulles de boues et un lit fluidis6 triphasique contenant des particules de petites tailles, ont Ct6 obtenus par deux systbmes de transfert de matitre:(1) I'Cchange d'ions K + -Na+ dans des lits de billes de resine cationique Cchangeuses d'ions, incluant des billes de resine Cchangeuses d'anions c o m e particules inertes; (2) la dissolution du zinc par du HCI dans des lits de billes de verre recouvertes de zinc et dans des lits de billes de verre non recouvertes. Les paramttres de fonctionnement sont la vitesse de gaz, la vitesse de liquide, le diamttre et la concentration des particules. La ddpendance des coefficients de transfert de matikre par rapport ?I ces paramttres est analysee du point de vue de I'energie apportCe dans les systkmes. Les corrClations des donnCes expckimentales utilisant des groupes adimensionnels sont comparCes ?I des corrClations antkrieures.Keywords: three-phase fluidized bed, slurry bubble column, particle-liquid mass transfer. lurry bubble columns and three-phase fluidized beds
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