Results 211 to 220 of about 18,394 (248)
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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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Gas dispersion properties: bubble surface area flux and gas holdup
Minerals Engineering, 2000Abstract Bubble surface area flux has been related to flotation performance and advocated as a key “machine variable”. Analysis of available data suggests that bubble surface area flux (S b ) and gas holdup ( e g ) are related by S b ∼ 5.5 e g .
J.A. Finch +3 more
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Gas holdup in a gas-liquid-solid reciprocating plate column
The Canadian Journal of Chemical Engineering, 1993The presence of solid particles at lower contents (up to 6% by volume) caused an increase in the gas holdup in the three-phase reciprocating plate column, compared to that in the two phase (gas-liquid) column of the same type, under the same other operating conditions. The decrease in the gas holdup, which was normally observed in the two-phase column,
D. U. Skala +4 more
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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-PHASE HOLDUP IN A SLURRY-BUBBLE COLUMN
Chemical Engineering Communications, 1997Abstract Total and sectional gas-phase holdups are measured in a wide (0.305 m internal diameter) and long (3.7 m) glass bubble column al ambient conditions as a function of superficial gas velocity. Sectional gas holdup values vary along the length of the column and decrease as the height above the gas distributor plate increases in the transitional ...
J. W. ZHU, V. H. TRIVEDI, S. C. SAXENA
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Gas Holdup in Bubble Column Bioreactor Degrading Phenol
Journal of Hazardous, Toxic, and Radioactive Waste, 2017AbstractPhenol is a harmful substance found in the wastewaters from certain chemical industries. In the present study phenol present in synthetic wastewater has been biodegraded in a bubble column bioreactor using Pseudomonas putida (NCIM-2650). Experiments have been carried out to determine gas holdup at various feed flow rates of synthetic wastewater,
Naveen Kumar Rayi +2 more
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Gas Holdup Characteristics in a Tapered Bubble Column
International Journal of Chemical Reactor Engineering, 2003Gas holdup characteristics were explored experimentally in a tapered bubble column of 3.00m height. The internal diameter increased from 0.10 m at the bottom to 0.20 m at the top. Two gas holdup characteristic parameters investigated were local gas holdup and overall gas holdup.
Kai Zhang, Yulong Zhao, Bijiang Zhang
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An Experimental Analysis Of Fission-Gas Holdup Beds
Nuclear Applications and Technology, 1970Exact equations for the experimental analysis of fission-gas holdup beds are developed by the method of statistical moments. The mean retention time, given by the first moment, is independent of the factors which affect mass transfer. This independence emphasizes the important fact, sometimes overlooked in the analysis of fission-gas holdup beds, that ...
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A Mechanistic Analysis of Fission-Gas Holdup Beds
Nuclear Applications, 1969The release of short-lived isotopes of krypton and xenon may be delayed by passage through an adsorbent bed.
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Accurate determination of gas holdup time
Journal of High Resolution Chromatography, 1978R. E. Kaiser, W. Bertsch
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