A unified correlation for predicting liquid axial dispersion coefficient in bubble columns

Citation
S. Moustiri et al., A unified correlation for predicting liquid axial dispersion coefficient in bubble columns, CHEM ENG SC, 56(3), 2001, pp. 1041-1047
Citations number
14
Categorie Soggetti
Chemical Engineering
Journal title
CHEMICAL ENGINEERING SCIENCE
ISSN journal
00092509 → ACNP
Volume
56
Issue
3
Year of publication
2001
Pages
1041 - 1047
Database
ISI
SICI code
0009-2509(200102)56:3<1041:AUCFPL>2.0.ZU;2-4
Abstract
Experimental measurements of gas holdup and liquid axial dispersion coeffic ients have been carried out in two bubble columns (column I; D-c = 15 cm an d column II; D-c = 20 cm), operating with co-current upflow of gas and liqu id. In addition, measurement of bubble size was investigated. Peclet number and liquid axial dispersion coefficient were calculated from the means and variances of the residence lime distribution (RTD) curve. The experimental data obtained show that the hydrodynamic of bubble column depends on super ficial gas and liquid velocities, column diameter and the gas flow regime. Present results and the available literature data were used to develop a mo del involving Bo, Re, Fr and Ga for predicting liquid axial dispersion coef ficient. (C) 2001 Elsevier Science Ltd. All rights reserved.