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Abstract:

Mixing in monosized particles and binary mixtures of solids in three-phase fluidized beds is investigated by means of a non-invasive Radioactive Particle Tracking technique (RPT). Pulses of particles at different column heights are constructed from the trajectory of a single radioactive tracer whose motion is tracked for several hours. For each pulse released, number distributions of particles in the axial direction are thus obtained for each instant of time from injections at different axial positions in the reactor. Using this information, axial mixing times for the solids are measured for the experimental conditions studied. A one-dimensional two-zone model based on the three-phase counter-current backmixing model used for gas-solid fluidization (Gwyn et al., 1970) is proposed and solved for these conditions to calculate solids axial number distributions and mixing times. Agreement between experimental and predicted results is satisfactory.

Registro:

Documento: Artículo
Título:Solids mixing in gas-liquid-solid fluidized beds: Experiments and modelling
Autor:Cassanello, M.; Larachi, F.; Guy, C.; Chaouki, J.
Filiación:Department of Chemical Engineering, Ecl. Polytech. de Montréal, Station Centre-Ville, Montréal, Que. H3C 3A7, Canada
PINMATE, Departamento de Industrias, 1428 Ciudad Universitaria, Buenos Aires, Argentina
Department of Chemical Engineering, Laval University, Sainte-Foy, Que. G1K 7P4, Canada
Palabras clave:Binary mixtures; Calculations; Chemical reactors; Fluidization; Mathematical models; Mixing; Particles (particulate matter); Radioactive tracers; Solids; Axial number distributions; Dirac injections; Radioactive particle tracking technique; Three phase counter current back mixing model; Fluidized beds; Fluidized Beds; Mixing; Solids
Año:1996
Volumen:51
Número:10
Página de inicio:2011
Página de fin:2020
DOI: http://dx.doi.org/10.1016/0009-2509(96)00058-9
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_v51_n10_p2011_Cassanello

Referencias:

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  • Larachi, F., Cassanello, M., Marie, M.N., Chaouki, J., Guy, C., Solids Circulation Patterns in Three-Phase Fluidized Beds Containing Binary Mixtures of Particles as Inferred from RPT (1995) Trans. IChemE Part A, 73, pp. 263-268
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Citas:

---------- APA ----------
Cassanello, M., Larachi, F., Guy, C. & Chaouki, J. (1996) . Solids mixing in gas-liquid-solid fluidized beds: Experiments and modelling. Chemical Engineering Science, 51(10), 2011-2020.
http://dx.doi.org/10.1016/0009-2509(96)00058-9
---------- CHICAGO ----------
Cassanello, M., Larachi, F., Guy, C., Chaouki, J. "Solids mixing in gas-liquid-solid fluidized beds: Experiments and modelling" . Chemical Engineering Science 51, no. 10 (1996) : 2011-2020.
http://dx.doi.org/10.1016/0009-2509(96)00058-9
---------- MLA ----------
Cassanello, M., Larachi, F., Guy, C., Chaouki, J. "Solids mixing in gas-liquid-solid fluidized beds: Experiments and modelling" . Chemical Engineering Science, vol. 51, no. 10, 1996, pp. 2011-2020.
http://dx.doi.org/10.1016/0009-2509(96)00058-9
---------- VANCOUVER ----------
Cassanello, M., Larachi, F., Guy, C., Chaouki, J. Solids mixing in gas-liquid-solid fluidized beds: Experiments and modelling. Chem. Eng. Sci. 1996;51(10):2011-2020.
http://dx.doi.org/10.1016/0009-2509(96)00058-9