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International Society for Industrial Process Tomography

8th World Congress on Industrial Process Tomography

Solid Motion in a Three-Phase Bubble Column Examined with Radioactive Particle Tracking

Gabriel Salierno1, Mauricio Maestri1, Stella Piovano1, Miryan Cassanello1, María Angélica Cardona2, Daniel Hojman2, Héctor Somacal2

1 Laboratorio de Reactores y Sistemas para la Industria–LARSI, Dep. Industrias, FCEyN, Universidad de Buenos Aires (UBA), Int. Güiraldes 2620, C1428BGA Buenos Aires, Argentina,

Phone: +54-11-45763300/18 ext.362,

2 Laboratorio de Diagnóstico por Radiaciones–LADiR, Dep. Física, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica (CNEA), San Martín, Buenos Aires, Argentina.

Phone: +54-11-67726581,


Radioactive Particle Tracking (RPT) is a powerful advanced technique for studying the solid motion within industrial scale multiphase reactors. However, straight implementation in operating industrial units is difficult due to the required calibration. This work has the aim of comparing results arising from studying the motion of calcium alginate beads in a three-phase bubble column (air-water-5mm diameter calcium alginate beads), either with RPT or with an array of the same scintillation detectors used for RPT located vertically aligned beside the analyzed vessel. Axial tracer trajectories, axial profiles of tracer positions, mixing times and solid dispersion coefficients obtained with both methods are compared for highlighting the relevant information that can be extracted from the simplified method validated by RPT. It is found that the simplified method fairly coincides with the classic technique.

Keywords axially aligned detectors, radioactive particle tracking, solid motion, three-phase bubble column

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