Gas-liquid mass transfer coefficient in stirred tanks interpreted through models of idealized eddy structure of turbulence in the bubble vicinity.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F04%3A00011145" target="_blank" >RIV/60461373:22340/04:00011145 - isvavai.cz</a>

Alternative codes found

RIV/67985858:_____/04:00099447

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Gas-liquid mass transfer coefficient in stirred tanks interpreted through models of idealized eddy structure of turbulence in the bubble vicinity.

Original language description

Experimental data on the average mass transfer liquid film coefficient (kL) in an aerated tank stirred by two Rushton turbines on common shaft are presented. Liquid media used were distilled water and 0.5 M sodium sulphate solution. Volumetric mass transfer coefficient (kLa) was measured by the dynamic pressure method with pure oxygen absorption. Specific interfacial area a was taken from Alves et al. [Chem. Eng. Proc., in press] who measured data on local gas hold-up and local average bubble diameter in the same apparatus and batches. Values of kL are quantitatively interpreted in terms of correlations based on idealized eddy structures of turbulence in the bubble vicinity, namely by "eddy" model by Lamont and Scott [AIChE J. 16 (1970) 513] in the form of kL =0.523 (e?/?)0.25 (D/?)0.5 , which fits the data with the mean deviation of 4.7%. It is shown that the decisive quantity to correlate kL in the stirred tank is power dissipated in the liquid phase rather than the bubble diameter a

Czech name

Gas-liquid mass transfer coefficient in stirred tanks interpreted through models of idealized eddy structure of turbulence in the bubble vicinity.

Czech description

Vhodnou experimentální technikou vyvinutou na pracovišti dříve byly proměřeny transportní charakteristiky dvoufázového systému kapalina-plyn a pro vsádku koalescentní a nekoalescentní byl přehodnocen závěr o mechanizmu mezifázového transportu hmoty.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/GA104%2F98%2F1126" target="_blank" >GA104/98/1126: Study of mass transfer mechanism from bubbles in gas/liquid dispersions</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2004

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Engineering and Processing

ISSN

0255-2701

e-ISSN

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Volume of the periodical

43

Issue of the periodical within the volume

1

Country of publishing house

BE - BELGIUM

Number of pages

17

Pages from-to

1511-1517

UT code for WoS article

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EID of the result in the Scopus database

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