Results 251 to 260 of about 3,203 (299)
Chemical Engineering Science, 2011 Cross Section Gas Holdup Distributions at 3/4 Dimensionless Static Liquid Height in a Gas-Liquid Stirred Standard Rushton Tank Were Measured using 137Cs Γ-CT Scan Measuring Technology at Larger Gas Flow Rates and Higher Impeller Rotating Speeds.
Muthanna H Al-Dahhan, M P Dudukovic
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Gas holdup in pneumatic reactors
The Chemical Engineering Journal, 1988Abstract The gas holdup expressions of the form eG = aU sg b often observed to be applicable in bubble columns and airlift reactors, are shown ...
M.Y. Chisti, M. Moo-Young
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Gas Holdup in Gas−Liquid Stirred Tanks
Industrial & Engineering Chemistry Research, 2010A single-point optical probe is developed that can accurately obtain local gas holdup in a gas-liquid stirred tank across a wide range of operating pressures, temperatures, and fluids. It is found that the probe orientation to the flow in a stirred tank can cause underestimations in gas holdup if only a single probe orientation is used.
Sean G. Mueller, Milorad P. Dudukovic
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Characterization of a gas‐liquid OBC: Bubble size and gas holdup
AIChE Journal, 2004AbstractA fundamental experimental study of gas‐liquid contacting in an oscillatory baffled column is presented focusing on the effect of fluid oscillation on gas holdup and bubble size. The results show that beyond a critical level of fluid oscillation the Sauter mean diameter of the dispersion is substantially reduced, while the gas holdup (and, thus,
Oliveira, Monica, Ni, X.
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Gas holdup and energy dissipation in liquid‐gas ejectors
Journal of Chemical Technology & Biotechnology, 2008AbstractBACKGROUND: Ejectors have excellent mass transfer characteristics with energy efficiency and can be used in place of conventional countercurrent systems, namely, packed bed contactors as well as venturi scrubbers, cyclones and airlift pumps. Although a number of papers have been published in the recent past, none of them provides a theoretical ...
Appusamy Arunagiri +2 more
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The effect of aspect ratio in counter-current gas-liquid bubble columns: Experimental results and gas holdup correlations [PDF]
International Journal of Multiphase Flow, 2017 It is generally admitted that the gas holdup is independent of the column dimensions and gas sparger design if three criteria are satisfied: the diameter of the bubble column is larger than 0.15 m, gas sparger openings are larger than 1–2 mm and the ...
Giorgio Besagni +2 more
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Effect of Gas Density on Gas Holdup in Bubble Columns
Chemie Ingenieur Technik, 2015AbstractGas density affects the gas holdup in bubble columns. Even at atmospheric pressure, different gases produce varying gas holdups. This contribution explores the causes for variations in gas holdups occurring for different gases. Differences in the bubble size distribution resulting from varying rates of bubble breakup and coalescence as well as ...
Kristin Hecht +5 more
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Liquid Holdup in Wet-Gas Pipelines
SPE Production Engineering, 1987Summary An experimental study of two-phase flow was conducted to investigate liquid holdup in wet-gas pipelines. The liquid-holdup data were obtained by passing spheres through a 1,333-ft [406.3-m] -long, 3.068-in. [77.93-mm] -ID horizontal pipe and measuring the liquid volumes removed. Three different two-phase mixtures were used.
K. Minami, J. P. Brill
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Gas Holdup in an Impinging-Stream Reactor
Chemical Engineering & Technology, 2000In this work, correlations for predicting the mean gas holdup in the impinging stream reactor are presented. To develop these correlations, measurement with water and air were carried out in two geometrically similar reactors of different size. In addition, the radial distribution of the local gas holdup in a plane of the main tube of both reactors was
A. O. Mudimu, E. S. Gaddis, A. Vogelpohl
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18 Gas holdup and liquid recirculation in gas-lift reactors
Chemical Engineering Science, 1980Abstract A model for predicting the liquid recirculation rate in gas-lift reactors was developed. The model relies on experimentally determined correlations for mean gas holdup and frictional pressure drop in two phase bubble flow. Model predictions were found to agree well with experimental measurements of liquid recirculation.
Y.C. Hsu, M.P. Duduković
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