Liquid hold-up; Catalytic structured packing; Katapak-SP; X-ray tomography; Flow distribution
Abstract :
[en] This paper presents the results of a study carried out to examine liquid hold-up and flow distribution in a 0.1m internal diameter column filled with catalytic structured packing Katapak-SP.
Information has been gathered at local scale by means of a non-intrusive high energy X-ray
tomograph. Measurements have been carried out in a large number of packing cross sections
situated at different heights between the top and bottom of the packed column, giving access to the evolution of axial profiles of liquid hold-up in the open channels (separation zone) and in the
catalytic baskets (reaction zone) as a function of the liquid load. The total hold-up, evaluated by
averaging local tomographic values over the packed volume, was compared with global hold-up
data obtained by traditional methods, like draining and RTD measurements.
A method was also proposed to deduce the distribution of liquid flowrate, between the reaction and the separation zones, from hold-up distribution measured by tomography. The methodology was validated by comparison with experimental data obtained by collecting separately the liquid flowing out of the two zones at the bottom of the packed bed. The obtained results are invaluable to improve the description of hydrodynamics in rate based performance models.
Disciplines :
Chemical engineering
Author, co-author :
Viva, Aurora; Université de Liège - ULiège > Département de Chimie appliquée > Laboratoire de Génie chimique
Aferka, Saïd ; Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Toye, Dominique ; Université de Liège - ULiège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Marchot, Pierre ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques
Crine, Michel ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires
Brunazzi, Elisabetta; University of Pisa > Department of Chemical Engineering (DICCISM)
Language :
English
Title :
Determination of liquid hold-up and flow distribution inside modular catalytic structured packings
Publication date :
2011
Journal title :
Chemical Engineering Research and Design
ISSN :
0263-8762
eISSN :
1744-3563
Publisher :
Institution of Chemical Engineers
Volume :
89
Pages :
1414-1426
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Action de Recherche Concertée : Advanced Experimental Techniques and Cellular Automaton Modelling of Multiphase Systems - Application to distillation and reactive distillation columns
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