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Abstract:

The feasibility of extracting relevant dynamic information of a bubble column from the approximate reconstruction of a radioactive tracer axial trajectory using a set of axially aligned detectors (AAD) is explored. The experimental procedure involves scanning simultaneously different column heights with scintillation detectors, located vertically aligned beside the examined vessel, while a neutrally buoyant radioactive tracer particle is freely moving inside. The reconstruction considers that the detectors located closer in axial coordinate to the tracer are the ones which record the largest number of counts. Based on this assumption, time series of the approximate tracer axial coordinate are obtained with a maximum resolution of 2. N-1 (N: number of detectors used). Compared to the powerful radioactive particle tracking (RPT) technique, although the information extracted is more limited, the present experimental procedure has the advantage of not requiring a calibration stage, which is rather cumbersome to implement at industrial scale and prevents RPT massive use for troubleshooting. Part of the information extracted from the analysis of tracer axial trajectories in RPT can also be inferred from the discrete tracer axial trajectories obtained with this methodology. Therefore, tracer fast axial velocity distributions, liquid axial mixing time and liquid holdup axial profiles are estimated from the reconstructed axial trajectories and related to the operating conditions, for experiments with water and non-Newtonian aqueous solutions of carboxymethyl cellulose (CMC). © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Discrete axial motion of a radioactive tracer reconstructed from the response of axially aligned detectors: Application to the analysis of a bubble column dynamics
Autor:Salierno, G.L.; Maestri, M.; Piovano, S.; Cassanello, M.; Cardona, M.A.; Hojman, D.; Somacal, H.
Filiación:PINMATE, Departamento de Industrias, FCEyN, Universidad de Buenos Aires, Intendente Güiraldes 2620, C1428BGA Buenos Aires, Argentina
Departamento de Física, Comisión Nacional de Energía Atómica (CNEA), Buenos Aires, Argentina
ECyT, Universidad Nacional de San Martín, San Martín, Argentina
Palabras clave:Axially aligned detectors; Bubble column hydrodynamics; Flow regimes; Gas holdup profiles; Mixing times; Radioactive tracers; Bubble columns; Fluidized beds; Information analysis; Liquids; Mixing; Non Newtonian flow; Radioactive tracers; Trajectories; Axial-velocity distribution; Carboxymethyl cellulose; Experimental procedure; Flow regimes; Gas hold up; Mixing time; Operating condition; Radioactive particle tracking; Detectors
Año:2013
Volumen:100
Página de inicio:402
Página de fin:412
DOI: http://dx.doi.org/10.1016/j.ces.2013.03.029
Título revista:Chemical Engineering Science
Título revista abreviado:Chem. Eng. Sci.
ISSN:00092509
CODEN:CESCA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00092509_v100_n_p402_Salierno

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Citas:

---------- APA ----------
Salierno, G.L., Maestri, M., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D. & Somacal, H. (2013) . Discrete axial motion of a radioactive tracer reconstructed from the response of axially aligned detectors: Application to the analysis of a bubble column dynamics. Chemical Engineering Science, 100, 402-412.
http://dx.doi.org/10.1016/j.ces.2013.03.029
---------- CHICAGO ----------
Salierno, G.L., Maestri, M., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. "Discrete axial motion of a radioactive tracer reconstructed from the response of axially aligned detectors: Application to the analysis of a bubble column dynamics" . Chemical Engineering Science 100 (2013) : 402-412.
http://dx.doi.org/10.1016/j.ces.2013.03.029
---------- MLA ----------
Salierno, G.L., Maestri, M., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. "Discrete axial motion of a radioactive tracer reconstructed from the response of axially aligned detectors: Application to the analysis of a bubble column dynamics" . Chemical Engineering Science, vol. 100, 2013, pp. 402-412.
http://dx.doi.org/10.1016/j.ces.2013.03.029
---------- VANCOUVER ----------
Salierno, G.L., Maestri, M., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. Discrete axial motion of a radioactive tracer reconstructed from the response of axially aligned detectors: Application to the analysis of a bubble column dynamics. Chem. Eng. Sci. 2013;100:402-412.
http://dx.doi.org/10.1016/j.ces.2013.03.029