X-ray tomography; Packed columns; High performance structured packings; Liquid Hold up distribution; Liquid maldistribution; Effective interfacial area
Abstract :
[en] In this paper, we report on the use of a high energy and high resolution X-ray tomograph to visualize and quantify the distribution of liquid hold up and of gas-liquid interfacial area in a 0.1m diameter column filled with MellapakPlus 752.Y packing elements. A standard air-water system at room temperature and atmospheric pressure was used. Tomographic measurements have been carried out in a large number of packing cross sections situated at different heights between the top and the bottom of the packed column, giving access to the evolution of axial profiles of liquid hold up and of gas-liquid interfacial area as a function of the operating conditions. Gas-liquid interfacial area values were also measured by a chemical method (CO2 absorption from air into a caustic solution). For the first time, a whole set of gas-liquid interfacial area values evaluated from tomographic images are interestingly compared with values measured by a chemical method. A comparison is also presented with literature models.
Disciplines :
Chemical engineering
Author, co-author :
Aferka, Saïd ; Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Viva, Aurora; Université de Liège - ULiège > Département dechimie appliquée > Laboratoire de Génie chimique
Brunazzi, Elisabetta; University of Pisa, > Department of Chemical Engineering (DICCISM)
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
Toye, Dominique ; Université de Liège - ULiège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Language :
English
Title :
Tomographic measurement of liquid hold up and effective interfacial area distributions in a column packed with high performance structured packings
Publication date :
2011
Journal title :
Chemical Engineering Science
ISSN :
0009-2509
eISSN :
1873-4405
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Volume :
66
Pages :
3413-3422
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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