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Tang KL, Ouyang Y, Agarwal RK, Chen JM, Xiang Y, Chen JF. Computation of gas-liquid flow in a square bubble column with Wray-Agarwal one-equation turbulence model. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115551] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Li X, Li G. Modeling and Simulation of Hydrodynamic Bubble-Liquid Turbulent Flows in Bubble-Column Reactors. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201600074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abdulkareem HA, Gheni SA, Yacoup RJ. Study of the Hydrodynamics and Mass Transfer Coefficient in a 2D Mimicked FT Slurry Bubble Columns for Alternative Clean Energy and Chemical Production. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2016. [DOI: 10.1515/ijcre-2015-0114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Bubble columns are widely used for contacting gas–liquid and gas–liquid–solid mass transfer/chemical reactions. Gas distributor is the most important accessory because it decides the bubble size/rise velocity and gas distribution. In this study, the effect of distributor design on hydrodynamics and mass transfer coefficient are studied at different operating conditions of height to diameter ratio, solid loading, and superficial gas velocity The overall gas holdup, is studied experimentally using a rectangular slurry bubble column operating at ambient temperature and pressure, using liquid paraffin (C9–C11), three heights to diameter ratios (6, 7.5 and 10) and silica as a solid phase (0 %, 9 % and 25 %) with oxygen as gas phase. Two types of distributor were used, perforated plate and ring type. The results showed that the overall gas holdup increased by increasing gas velocity and decreased by increasing height to diameter ratio and solid loading. Also, it is found that the perforated plate distributor gave a higher gas hold up than ring distributor at gas velocity higher than 0.03 m/sec. The following correlations are obtained:
Plate distributor at presence of silica particles:
$$\eqalign{{{\rm{\varepsilon}}_{\rm{g}}} =& {\left({1.343{\rm{U}}_{\rm{g}}^{0.0612} - 0.00891{\rm{\varepsilon}}_{\rm{s}}^{- 0.374} - 0.702{{\left({{{\rm{L}} \over {\rm{D}}}} \right)}^{0.041}}} \right)^{4.904}}\cr& - 0.0251}$$
Ring distributor at presence and absence of silica particles:
$$\eqalign{{{\rm{\varepsilon}}_{\rm{g}}} = &{\left({0.216{\rm{U}}_{\rm{g}}^{0.297} - 0.354{\rm{\varepsilon}}_{\rm{s}}^{1.4671} - 0.127{{\left({{{\rm{L}} \over {\rm{D}}}} \right)}^{0.147}}} \right)^{1.1206}} \cr&+ 0.058}$$
There is a good agreement between experimental and predicted values with a percent of error less than 2 %.
It has been found that the mass transfer coefficient is higher for ring distributor than the perforated plate and growing higher for heterogeneous flow regime and higher solid loading.
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Orhan R, Dursun G. Effects of surfactants on hydrodynamics and mass transfer in a co-current downflow contacting column. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2016.02.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ganguly SK, Varun N, Kumar S, Khatri PK, Jain SL, Garg MO, Pellegrini LA. A Review on Gas-Liquid Reactions in Light Oil Sweetening: Kinetics and Reactor Design Aspects. CHEMBIOENG REVIEWS 2014. [DOI: 10.1002/cben.201400015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nanobubble generation and its applications in froth flotation (part IV): mechanical cells and specially designed column flotation of coal. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/s1674-5264(09)60259-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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FAN M, TAO D, HONAKER R, LUO Z. Nanobubble generation and its applications in froth flotation (part III): specially designed laboratory scale column flotation of phosphate. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/s1674-5264(09)60205-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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