Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns
In this study, in a three-phase reactor with a rectangular cross-section, the effects of liquid circulation rates and solid particle concentration on gas holdup and bubble size distribution (BSD) were investigated. Air, water, and glass beads were used as the gas, liquid, and solid phases, respectiv...
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MDPI AG
2025-01-01
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| author | Sadra Mahmoudi Mark W. Hlawitschka |
| author_facet | Sadra Mahmoudi Mark W. Hlawitschka |
| author_sort | Sadra Mahmoudi |
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| description | In this study, in a three-phase reactor with a rectangular cross-section, the effects of liquid circulation rates and solid particle concentration on gas holdup and bubble size distribution (BSD) were investigated. Air, water, and glass beads were used as the gas, liquid, and solid phases, respectively. Different liquid circulation velocities and different solid loads were applied. The results demonstrate that increasing solid content from 0% to 6% can decrease gas holdup by 50% (due to increased slurry phase viscosity and promotion of bubble coalescence). Also, increasing the liquid circulation rate showed a weak effect on gas holdup, although a slight incremental effect was observed due to the promotion of bubble breakup and the extension of bubble residence time. The gas holdup in counter-current slurry bubble columns (CCSBCs) was predicted using a novel correlation that took into account the combined effects of solid concentration and liquid circulation rate. These findings are crucial for the design and optimization of the three-phase reactors used in industries such as mining and wastewater treatment. |
| format | Article |
| id | doaj-art-05cabb143c4b401a9c94f809dedf861b |
| institution | Kabale University |
| issn | 2311-5521 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Fluids |
| spelling | doaj-art-05cabb143c4b401a9c94f809dedf861b2025-01-24T13:32:36ZengMDPI AGFluids2311-55212025-01-011011410.3390/fluids10010014Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble ColumnsSadra Mahmoudi0Mark W. Hlawitschka1Institute of Process Engineering, Johannes Kepler University Linz (JKU), Altenbergerstr. 69, 4040 Linz, AustriaInstitute of Process Engineering, Johannes Kepler University Linz (JKU), Altenbergerstr. 69, 4040 Linz, AustriaIn this study, in a three-phase reactor with a rectangular cross-section, the effects of liquid circulation rates and solid particle concentration on gas holdup and bubble size distribution (BSD) were investigated. Air, water, and glass beads were used as the gas, liquid, and solid phases, respectively. Different liquid circulation velocities and different solid loads were applied. The results demonstrate that increasing solid content from 0% to 6% can decrease gas holdup by 50% (due to increased slurry phase viscosity and promotion of bubble coalescence). Also, increasing the liquid circulation rate showed a weak effect on gas holdup, although a slight incremental effect was observed due to the promotion of bubble breakup and the extension of bubble residence time. The gas holdup in counter-current slurry bubble columns (CCSBCs) was predicted using a novel correlation that took into account the combined effects of solid concentration and liquid circulation rate. These findings are crucial for the design and optimization of the three-phase reactors used in industries such as mining and wastewater treatment.https://www.mdpi.com/2311-5521/10/1/14three-phase flowshydrodynamicsslurry bubble columnsolid particlesgas holdup |
| spellingShingle | Sadra Mahmoudi Mark W. Hlawitschka Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns Fluids three-phase flows hydrodynamics slurry bubble column solid particles gas holdup |
| title | Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns |
| title_full | Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns |
| title_fullStr | Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns |
| title_full_unstemmed | Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns |
| title_short | Impact of Solid Particle Concentration and Liquid Circulation on Gas Holdup in Counter-Current Slurry Bubble Columns |
| title_sort | impact of solid particle concentration and liquid circulation on gas holdup in counter current slurry bubble columns |
| topic | three-phase flows hydrodynamics slurry bubble column solid particles gas holdup |
| url | https://www.mdpi.com/2311-5521/10/1/14 |
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