Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation

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 acco...

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Autores principales: Belfares, L., Cassanello, M., Grandjean, B.P.A., Larachi, F.
Formato: JOUR
Materias:
Bubble columns
Chemical reactions
Neural networks
Newtonian liquids
Non Newtonian liquids
Packed beds
Reynolds number
Liquid back-mixing
Peclet number
Catalyst activity
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09205861_v64_n3-4_p321_Belfares
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09205861_v64_n3-4_p321_Belfares
record_format dspace
spelling todo:paper_09205861_v64_n3-4_p321_Belfares2023-10-03T15:44:58Z Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation Belfares, L. Cassanello, M. Grandjean, B.P.A. Larachi, F. Bubble columns Chemical reactions Neural networks Newtonian liquids Non Newtonian liquids Packed beds Reynolds number Liquid back-mixing Peclet number Catalyst activity 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09205861_v64_n3-4_p321_Belfares
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Bubble columns
Chemical reactions
Neural networks
Newtonian liquids
Non Newtonian liquids
Packed beds
Reynolds number
Liquid back-mixing
Peclet number
Catalyst activity
spellingShingle Bubble columns
Chemical reactions
Neural networks
Newtonian liquids
Non Newtonian liquids
Packed beds
Reynolds number
Liquid back-mixing
Peclet number
Catalyst activity
Belfares, L.
Cassanello, M.
Grandjean, B.P.A.
Larachi, F.
Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
topic_facet Bubble columns
Chemical reactions
Neural networks
Newtonian liquids
Non Newtonian liquids
Packed beds
Reynolds number
Liquid back-mixing
Peclet number
Catalyst activity
description 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.
format JOUR
author Belfares, L.
Cassanello, M.
Grandjean, B.P.A.
Larachi, F.
author_facet Belfares, L.
Cassanello, M.
Grandjean, B.P.A.
Larachi, F.
author_sort Belfares, L.
title Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
title_short Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
title_full Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
title_fullStr Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
title_full_unstemmed Liquid back-mixing in packed-bubble column reactors: A state-of-the-art correlation
title_sort liquid back-mixing in packed-bubble column reactors: a state-of-the-art correlation
url http://hdl.handle.net/20.500.12110/paper_09205861_v64_n3-4_p321_Belfares
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AT cassanellom liquidbackmixinginpackedbubblecolumnreactorsastateoftheartcorrelation
AT grandjeanbpa liquidbackmixinginpackedbubblecolumnreactorsastateoftheartcorrelation
AT larachif liquidbackmixinginpackedbubblecolumnreactorsastateoftheartcorrelation
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