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Abstract:

The extent of liquid back-mixing in gas-liquid concurrent upflow packed-bubble column reactors is quantified in terms of an axial dispersion coefficient or its corresponding dimensionless Peclet number. Effects of reactor operating conditions on the axial dispersion coefficient are not properly accounted for by the available literature correlations, wherein most often the Peclet number is expressed solely in terms of the gas and liquid Reynolds numbers or superficial velocities. Based on the broadest experimental databank (1322 measurements, 11 liquids, four gases, 28 packing materials, 14 columns diameters, Newtonian, non-Newtonian, aqueous, organic, coalescing and non-coalescing liquids, high pressure, bubble and pulsing flow regime conditions), a state-of-the-art liquid axial dispersion coefficient correlation is obtained by combining neural network modeling and dimensional analysis. Thorough qualitative and quantitative analyses of the constructed databank demonstrate the robustness of the proposed correlation to restore the variety of trend variations of liquid Peclet numbers reported in the literature.

Registro:

Documento: Artículo
Título:Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
Autor:Belfares, L.; Cassanello, M.; Grandjean, B.P.A.; Larachi, F.
Filiación:Department of Chemical Engineering, CERPIC, Université Laval, Ste-Foy, Que. G1K 7P4, Canada
PINMATE, Departmento de Industrias, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Bubble columns; Chemical reactions; Neural networks; Newtonian liquids; Non Newtonian liquids; Packed beds; Reynolds number; Liquid back-mixing; Peclet number; Catalyst activity
Año:2001
Volumen:64
Número:3-4
Página de inicio:321
Página de fin:332
DOI: http://dx.doi.org/10.1016/S0920-5861(00)00535-6
Título revista:Catalysis Today
Título revista abreviado:Catal Today
ISSN:09205861
CODEN:CATTE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v64_n3-4_p321_Belfares

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Citas:

---------- APA ----------
Belfares, L., Cassanello, M., Grandjean, B.P.A. & Larachi, F. (2001) . Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation. Catalysis Today, 64(3-4), 321-332.
http://dx.doi.org/10.1016/S0920-5861(00)00535-6
---------- CHICAGO ----------
Belfares, L., Cassanello, M., Grandjean, B.P.A., Larachi, F. "Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation" . Catalysis Today 64, no. 3-4 (2001) : 321-332.
http://dx.doi.org/10.1016/S0920-5861(00)00535-6
---------- MLA ----------
Belfares, L., Cassanello, M., Grandjean, B.P.A., Larachi, F. "Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation" . Catalysis Today, vol. 64, no. 3-4, 2001, pp. 321-332.
http://dx.doi.org/10.1016/S0920-5861(00)00535-6
---------- VANCOUVER ----------
Belfares, L., Cassanello, M., Grandjean, B.P.A., Larachi, F. Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation. Catal Today. 2001;64(3-4):321-332.
http://dx.doi.org/10.1016/S0920-5861(00)00535-6