No full text
Poster (Scientific congresses and symposiums)
Surface aeration in baffled stirred tanks: hydrodynamics, mixing and mass transfer characteristics
de Lamotte, Anne; Delafosse, Angélique; Calvo, Sébastien et al.
201510th European Congress of Chemical Engineering
 

Files


Full Text
No document available.
Full Text Parts
ECCE2015.pdf
Publisher postprint (4.6 MB)
Request a copy
Submission-1600-v6.pdf
Publisher postprint (101.79 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Stirred Tanks; Hydrodynamics; Mixing; Mass Transfer; PIV; PLIF
Abstract :
[en] Biotechnological and chemical processes often need a supply of gas for acceptable product formation. In some applications - where either gas requirements/reactor volumes are relatively low, or bubbles are undesirable - aeration through the liquid free-surface is enough to meet the demand. In case of sparged stirred tanks, aeration through the liquid free-surface is a factor to be determined when scaling-up /down processes. Gas-liquid transfer is strongly influenced by the hydrodynamic conditions. Two phenomena, occurring at different scales, can be coupled in order to explain mass transfer : (i) circulation (macroscale) and (ii) mixing/homogenization (microscale). Mixing/homogenization takes into consideration the small eddies responsible for the rippled liquid free-surface and for the concentration gradients surrounding it. Circulation determines the fluid path across the reactor as well as its contribution of the surface aeration and leads to periodic and local deformation of the liquid free-surface. Circulation also accounts for the design of the reactor, where the scaling problems are focused. The objective of this work is to develop an experimental approach able to fully (global and local quantities) characterize a chosen agitation configuration in terms of hydrodynamics, mixing and transfer, in order to assess the capability of computational methods to predict gas-liquid mass transfer due to aeration through the liquid free-surface.
Disciplines :
Chemical engineering
Author, co-author :
de Lamotte, Anne ;  Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Delafosse, Angélique ;  Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Calvo, Sébastien ;  Université de Liège > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces
Collignon, Marie-Laure ;  Université de Liège > Département de chimie appliquée > Département de chimie appliquée
Toye, Dominique  ;  Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Language :
English
Title :
Surface aeration in baffled stirred tanks: hydrodynamics, mixing and mass transfer characteristics
Publication date :
September 2015
Event name :
10th European Congress of Chemical Engineering
Event place :
Nice, France
Event date :
from September 27th 2015 to October 1st 2015
Audience :
International
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 17 November 2015

Statistics


Number of views
150 (21 by ULiège)
Number of downloads
0 (0 by ULiège)

Bibliography


Similar publications



Contact ORBi