Results 201 to 210 of about 18,394 (248)
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Gas holdup in flotation columns: laboratory measurements
International Journal of Mineral Processing, 2001The gas holdup in laboratory flotation columns was measured using a conductivity probe. Measurements in a 50-cm-diameter flotation column have shown that gas holdup varies radially depending on the sparging system array, surfactants addition, and spargers malfunctions. The column was run in two modes: unbaffled (open), and baffled (vertically).
F.J Tavera, R Escudero, J.A Finch
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Gas holdup in stacked expanded metal sheets
AIChE Journal, 1992AbstractThe gas holdup in different arrays of expanded metal sheets was determined by the conductimetric method.A model had to be developed for analyzing the conductimetric behavior of the cell in the presence of the metallic sheets. The validity of this model has been verified with single phase flow.
Stella Piovano +2 more
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Static holdup in Gas – Flowing solids – Fixed bed contactors
Powder Technology, 2009Abstract Static holdup was investigated experimentally and theoretically in gas – flowing solids – fixed bed bench-scale contactors. Diverse packing elements were used: Raschig rings, ceramic beads, crushed stone and glass beads. Four different flowing solids particles were examined: sand, propant, alumina and glass.
Nikačević, Nikola +3 more
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Improved gas holdup in novel bubble column
The Canadian Journal of Chemical Engineering, 2011AbstractThis investigation reports the experimental and theoretical results carried out to evaluate the gas holdup for air–water system in a novel hybrid rotating and reciprocating perforated plate bubble column under countercurrent condition. The response of this hybrid column is found to be similar to that of reciprocating plate column (RPC) showing ...
S. Dhanasekaran, T. Karunanithi
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Modelling Gas Holdup in Flotation Column Froths
The Canadian Journal of Chemical Engineering, 2007AbstractA one‐dimensional steady‐state model is developed for the prediction of axial variation of the gas holdup in flotation column froths. Froth is considered as an inverse fluidized bed of bubbles and hence the frictional pressure gradient is obtained based on the energy balance.
Manish R. Bhole, Jyeshtharaj B. Joshi
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Gas Holdup in Trayed Bubble Column Reactors
Industrial & Engineering Chemistry Research, 2006The sectionalization of conventional bubble columns by perforated trays into trayed bubble columns (TBCs) has much potential in biochemical and petroleum refining processes, as an effective way to ...
Javier Alvaré, Muthanna H. Al-Dahhan
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Modeling Gas Holdup in Gas−Liquid−Fiber Semibatch Bubble Columns
Industrial & Engineering Chemistry Research, 2005Three gas holdup models are developed that correspond to different flow regimes in a 15.24-cm-diameter semibatch bubble column filled with various fiber suspensions. Three different perforated plate aerators are used and have open area ratios (A) of 0.57%, 0.99%, and 2.14%.
Su, Xuefeng, Heindel, Theodore
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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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Gas holdup in cyclone-static micro-bubble flotation column
Environmental Technology, 2015The present work has been carried out to investigate the effect of process variables on gas holdup and develop an empirical equation and a neural network model for online process control of the gas holdup based on the operating variables. In this study, the effect of process variables (nozzle diameter, circulation pressure, aeration rate, and frother ...
Xiaobing, Li +5 more
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