Results 1 to 10 of about 29,070 (268)
Investigation of Operating Parameters’ Effects on Bubble Characteristics in a Co-Current Downflow Bubble Column [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2022 Bubble columns are frequently employed as multiphase reactors and gas-liquid contactors. In the bubble column, gas is dispersed into the liquid phase. The dispersion of gas into a liquid is the function of bubble size and its distribution.
Rohit Meshram +3 more
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Remote Sensing, 2022 Bubble plumes, as main manifestations of seabed gas leakage, play an important role in the exploration of natural gas hydrate and other resources. Multibeam water column images have been widely used in detecting bubble plume targets in recent years ...
Junxia Meng, Jun Yan, Jianhu Zhao
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A Hydrodynamic Study in a Sieve Plate Sectionalized Bubble Column [PDF]
Engineering and Technology Journal, 2011 The sectionalization of conventional bubble columns to tray bubble column by perforated trays has been used in chemical, biochemical, and petroleum processes as an effective way to improve the gas-liquid contacting efficiency, and reduce liquid ...
Burhan Sadeq Abdulrazzaq
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Bubble properties of heterogeneous bubbly flows in a square bubble column [PDF]
AIP Conference Proceedings, 2010 The present work focuses on the measurements of bubble properties in heterogeneous bubbly flows in a square bubble column. A four-point optical fibre probe was used for this purpose. The accuracy and intrusive effect of the optical probe was investigated first.
W. Bai +7 more
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Fluids, 2020 The present study used a sparged bubble column to study the mixing of a passive scalar under bubble-induced diffusion. The effect of gas superficial velocity (up to 69 mm/s) and external vertical vibrations (amplitudes up to 10 mm, frequency <23 Hz ...
Shahrouz Mohagheghian +2 more
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EXPERIMENTAL STUDY OF LIQUID DISPERSION IN BUBBLE COLUMN
Diyala Journal of Engineering Sciences, 2008 The main object of this study is to investigate the influence of column diameter and superficial gas velocity on liquid phase dispersion coefficients (axial and radial dispersion coefficients), mixing times, gas holdup, and bubble dynamics (bubble ...
Hayder Abd Al-kaream Muhsin
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Fluid Dynamic in Bubble Columns with Heat Exchanger Internals [PDF]
Engineering and Technology Journal, 2014 The effects of vertical cooling internals on the gas hydrodynamics was studied in gas-liquid system (bubble columns) for column diameters, 15 and 30 cm in the absence and presence of internals (the % occluded area by internals 5, 10, and 20%).
Burhan Sadeq Abdulrazzaq
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“Bubble Bunch” phenomenon in operation of a bubble column
Open Chemistry, 2009 Abstract While studying the operation of a rectangular bubble column in laboratory scale, it was observed that under certain circumstances tiny bubbles attach to larger bubbles without causing them to coalesce. In other words, bubbles with large diameters (d > 5 mm) swept tiny bubbles (d
Bastani Dariush +2 more
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KAGAKU KOGAKU RONBUNSHU, 2001 気泡塔のガスホールドアップに対する圧力の影響をガス分散器として用いた単一ノズルの内径およびガスの種類をN2とCO2に変化させて実験的に検討した．単一ノズルの内径が4.0mmの場合にはガスホールドアップに対する圧力の影響はガスの種類によらずほとんど認められなかった．単一ノズルの内径が1.4mmでN2を用いた場合には，ガスホールドアップは圧力とともに増加した．単一ノズルの内径が1.4mmでCO2を用いた場合には，ガスホールドアップは0.6MPa付近まで圧力と共に増加した，さらに圧力が上昇するとガスホールドアップは減少した．塔壁面での気泡の写真撮影および塔中心部での気泡頻度の測定を行い，前述の現象の原因について実験的に検討した．
Ishiyama, Hiroshi +3 more
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Chemical Engineering Journal Advances, 2021 The gas dispersion state within the bubble columns and reactors greatly affects their performance. A bubble sampler is a useful device to measure gas dispersion in the operating bubble columns and reactors as it has an adjustable sampling part that ...
Changzhi Bai +3 more
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