Results 131 to 140 of about 2,370 (195)

MASS TRANSFER AND PHASE HOLDUP CHARACTERISTICS IN THREE-PHASE FLUIDIZED BEDS

open access: yesChemical Engineering Communications, 1993
The effects of liquid surface tension (42.6 ∼ 72,4 mN/m) and viscosity (1 ∼214mPa • sn), liquid (0.01 ∼0.12m/s) and gas (0.01 ∼0.20m/s) velocities and particle sizes (1 — 8 mm) on phase holdup and mass transfer coefficient ( kLa) have been determined in a 0.142 m-I.D. × 2.0 m-high Plexiglas column.
Jong-Oh Kim, Sang Done Kim
exaly   +4 more sources

Numerical Investigation of Gas Holdup and Phase Mixing in Bubble Column Reactors

open access: yesIndustrial & Engineering Chemistry Research, 2011
A discrete bubble model (DBM) has been used to study the overall gas holdup and the phase mixing in bubble column reactors. The Eulerian–Lagrangian approach has the advantage that it is possible to study the overall gas holdup and the gas phase mixing in a direct way.
Bai, W., Deen, N.G., Kuipers, J.A.M.
openaire   +3 more sources

Dispersed‐Phase Holdup and Characteristic Velocity in an Agitated‐Pulsed Solvent Extraction Column

open access: yesChemical Engineering and Technology, 2021
The agitated-pulsed column (APC) is expected to exhibit good transfer. The dispersed-phase holdup and characteristic velocity were measured using a 25-mm diameter APC.
Boren Tan, Longxiang Li, Yong Wang
exaly   +2 more sources

Experimental Analysis of Gas Holdup Measured by Gas Array Tool in Gas–Water Two Phase of Horizontal Well

open access: yesCoatings, 2021
In the gas-water two phase of horizontal well, gas holdup is usually obtained by inverse calculation of the water holdup measured by the array capacitance probes. Gas Array Tool (GAT) has been developed to directly measure gas holdup. This instrument has
Junfeng Liu
exaly   +2 more sources

Holdup in two phase flow

International Journal of Multiphase Flow, 1984
Abstract A wide range of experimental holdup data have been analysed on the basis of the general correlations of Chen & Spedding (1983). For upward inclined flow, holdup data in the range ( R G / R L ) = 4.0 to 275 were handled using a modification of the Chen & Spedding method, and for the case of ( R G / R L ) ⩽
P.L. Spedding, J.J.J. Chen
openaire   +1 more source

Phase holdups in three‐phase fluidized beds

AIChE Journal, 1987
AbstractThe local bubble frequency, the local phase holdups and the local bed porosity in three‐phase fluidized beds were measured. Air, water, and 250 μm glass beads were used as the gas, liquid, and solid phases. The effects of gas and liquid velocities on phase holdups were studied.
S. L. P. Lee, H. I. de Lasa
openaire   +1 more source

Prediction of dispersed phase holdup in pulsed disc and doughnut solvent extraction columns under different mass transfer conditions

open access: yesChinese Journal of Chemical Engineering, 2016
Using published experimental results from pulsed disc and doughnut solvent extraction columns, a unified correlation for the prediction of dispersed phase holdup that considers the effects of mass transfer is presented.
Kathryn H Smith   +2 more
exaly   +2 more sources

Phase holdup characteristics in three phase fluidized beds

The Chemical Engineering Journal, 1990
Abstract The bed porosity and the individual phase holdup characteristics in three phase fluidized beds with a wide range of liquid properties have been examine The liquid phase holdup increases with liquid velocity and viscosity, column diameter and liquid surface tension; it decreases with gas velocity, parti The liquid phase holdup and the bed ...
Joo H. Han, Gabriel Wild, Sang D. Kim
openaire   +1 more source

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