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Bubble size and mass transfer coefficients in dual-impeller agitated reactors

✍ Scribed by Mounir Bouaifi; Michel Roustan

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 749 KB
Volume: 76
Category: Article
ISSN: 0008-4034
DOI: 10.1002/cjce.5450760307

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✦ Synopsis

The study relates to the mass transfer and the bubble size in a non standard vessel equipped with various dual-impeller combinations. The effects of the rotational speed, gas flow rate, impeller type and diameter are investigated. The volumetric mass transfer coefficient kLa and the bubble size dbs were studied. The liquid side mass transfer coefficient kL and the volumetric interfacial area a were estimated separately. A comparison has been made with some existing correlations.

L'Ctude porte sur 1'Ctude de la taille et la distribution de la taille des bulles ainsi que le transfert de matitre gaz-liquide dans des systtmes Cquip6s de deux mobiles d'agitation. Les effets de la vitesse d'agitation, du d6bit gazeux et du type d'agitdteur ont CtC mis en evidence. Le coefficient de transfert de matitre volumCtrique k,u et la taille des bulles dhs ont CtC estimCs. Le coefficient de transfert de matitre cBtC liquide kL et I'aire interfaciale a ont CtC estimCs separement. Les rtsultats ont 6th cornparks avec des corrklations existantes dans la littbrature. Keywords: bubble size, interfacial area, mass transfer coefficients, dual-impeller, agitated vessel. ass transfer from the gas phase to the liquid phase is

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