Results 181 to 190 of about 785 (214)
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Study of gas holdup for bubble column at three phases
AIP Conference Proceedings, 2018The gas holdup of bubble column reactor is an important step to designing an efficient slurry reactor for large-scale conversion of synthesis gas to liquid hydrocarbons. Gas holdup considered a main variable affecting the reaction rate of gas-to-liquid (GTL) conversion.
Laith A. Hameed +5 more
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A Production Logging Measurement of Distributed Local Phase Holdup
European Production Operations Conference and Exhibition, 1996Abstract This paper describes early UKCS experience of a new production logging sensor, the Digital Entry and Fluid Imager, or DEFT* tool. Deviated and horizontal wells can cause complex flow regimes to arise that render interpretation of conventional production logging sensors difficult or sometimes impossible.
F.R. Halford +3 more
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HYDRODYNAMICS OF UNBAFFLED BUBBLE COLUMNS: GAS-PHASE HOLDUP
Chemical Engineering Communications, 1999Abstract Gas-phase holdup is measured in a 0·305 m diameter bubble column at ambient temperature and pressure as a function of superficial gas velocity. An air-water system is investigated for two values (1.35 m and 2.45 m) of the slumped water column height and air velocity in the range 0–0·3 m/s.
J. W. ZHU, S. C. SAXENA
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Use of ultrasound for phase holdup measurements in multiphase systems
The Canadian Journal of Chemical Engineering, 2001AbstractThis study evaluates ultrasound as a non‐invasive technique for determining the cross‐sectional holdups of multiphase systems. Experiments are performed in a column of 292 mm inner diameter with air, water and uniform glass beads of 1.3 mm diameter as the particles.
Arturo Macchi +2 more
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Liquid Holdup Correlations for Inclined Two-Phase Flow
Journal of Petroleum Technology, 1983Summary Liquid holdup behavior in two-phase inclined flow was studied in an inclined pipe-flow simulator. Two sets of empirical equations, one each for uphill and downhill flow, are presented. For downhill stratified flow, a third equation is presented.
Hemanta Mukherjee, James P. Brill
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Dispersion and holdup in a three-phase fluidized-bed bioreactor
Applied Biochemistry and Biotechnology, 1989Axial dispersion and phase holdup measurements were made using electroconductivity in a fermenting fluidized-bed bioreactor (FBR) and in a model nonfermenting three-phase FBR. Multiple axial conductivity probes were used to nonintrusively monitor the bed conductivity.
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Dispersed‐phase holdup in a rotating disk extraction column
AIChE Journal, 1961AbstractA study has been made of the effect of column geometry and flow condition upon the dispersed‐phase holdup in an rotating disk type of extraction column. Variables investigated were stator opening, disk diameter, compartment height, rotor speed, and flow rates of the dispersed and continuous phases.
E. Y. Kung, R. B. Beckmann
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DISPERSED PHASE HOLDUP IN PULSED PERFORATED PLATE COLUMNS
Solvent Extraction and Ion Exchange, 1990ABSTRACT Data on dispersed phase holdup are presented for a range of aqueous-organic systems, and are used to assess the accurancy of existing methods for its prediction. The Griffith model (2) for the mixer-settler region and the Thornton correlation (3) for the dispersion region were found to be the most accurate for high interfaclal tension systems;
Leanne M. Prvcic +2 more
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Numerical Investigation of Gas Holdup and Phase Mixing in Bubble Column Reactors
Industrial & Engineering Chemistry Research, 2011A 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.
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Verification of a two-phase holdup relation
Chemical Engineering Science, 1978P.L. Spedding, J.J.J. Chen
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