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Journal articles on the topic 'Bubble column reactor'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Ning, Chen, and Fang Bing Wang. "Numerical Simulation of Hydrodynamics in Slurry Bubble Column Reactor." Applied Mechanics and Materials 303-306 (February 2013): 2679–82. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.2679.

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Gas dispersion and solid suspension in industrial size slurry bubble column reactors for producing sodium dichromate are simulated numerically by using of computational fluid dynamics (CFD). The Eulerian multi-fluid model and standard k-ε turbulence model are used to describe the flow behavior in bubble columns. The simulated results show that gas is easy to flow toward the centre of the bubble column and in relatively high local gas holdup there. Installing gas-re-distributors in the bubble column is favorable for gas dispersion. Solid suspension in the bubble columns under the operating cond

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2

Arunkumar, S., V. Harshavardhan Reddy, T. M. Sreevathsav, and M. Venkatesan. "Hydrodynamic Study of Bubbles in a Bubble Column Reactor Part II – Numerical Study." Applied Mechanics and Materials 813-814 (November 2015): 1023–27. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.1023.

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The present work deals with the use of CFD analysis and the validation of the experimental work carried out on the artificial splitting of an air bubble in a bubble column reactor. In Part I of this work, artificial splitting of bubble in a bubble column rector is experimentally studied by using a high speed camera. Image processing technique was used to identify bubble size and bubble velocity. In present work CFD simulations are carried out using ANSYS FLUENT software using Volume of Fluids (VOF) method. VOF is based on a surface tracking technique applied to a fixed Eulerian space. The phas

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3

Hammond, Keren Naa Merley, Kofi Aduhene Bosumbru, Kelvin Aduse-Poku, and Kwame Sarkodie. "Flow regime dynamics in a bubble column reactor." Journal of the Ghana Institution of Engineering (JGhIE) 24, no. 3 (2024): 9–20. https://doi.org/10.56049/jghie.v24i3.215.

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This study investigates fluid dynamics within bubble column reactors. Using an air-water system, flow regimes were generated and assessed using predictive models such as homogenous, Armand, and drift flux models. This study highlights the complexities of two-phase fluid flow, particularly focusing on the dynamic behaviours of fluids and bubbles within the column reactor. The experimental setup consisted of a transparent test section, utilizing advanced image processing techniques to accurately determine gas holdups and their relationship with superficial velocities. The results show that the H

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4

Hadavand, Laleh, and Ali Fadavi. "Effect of Vibrating Sparger on Mass Transfer, Gas Holdup, and Bubble Size in a Bubble Column Reactor." International Journal of Chemical Reactor Engineering 11, no. 1 (2013): 47–56. http://dx.doi.org/10.1515/ijcre-2012-0094.

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Abstract Bubble size has a key role in gas holdup and mass transfer in bubble column reactors. In order to have small and uniform bubbles, a new structure was designed; the reactor operates in two modes, with vibrating sparger and conventional bubble column in which sparger is fixed. In vibrating mode, the sparger vibrates gently during gas entering. The vibrating sparger performs like a paddle, resulting in a forced recirculation of gas–liquid inside the reactor; moreover, the bubble detachment is accelerated. The superficial gas velocity was between 0.003 and 0.013 ms− 1, and the vibration f

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5

Kováts, P., and K. Zähringer. "Statistical Analysis of Bubble Parameters from a Model Bubble Column with and without Counter-Current Flow." Fluids 9, no. 6 (2024): 126. http://dx.doi.org/10.3390/fluids9060126.

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Bubble columns are widely used in numerous industrial processes because of their advantages in operation, design, and maintenance compared to other multiphase reactor types. In contrast to their simple design, the generated flow conditions inside a bubble column reactor are quite complex, especially in continuous mode with counter-current liquid flow. For the design and optimization of such reactors, precise numerical simulations and modelling are needed. These simulations and models have to be validated with experimental data. For this reason, experiments were carried out in a laboratory-scal

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6

Naveen, S., T. Sriram, S. Prithvi Raj, and M. Venkatesan. "Hydrodynamic Study of Bubbles in a Bubble Column Reactor Part I – Image Processing." Applied Mechanics and Materials 813-814 (November 2015): 1018–22. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.1018.

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The study of bubble column reactors has its significance in applications such as multiphase reactors, aerators and in industrial waste-water treatment. Extensive works has been done in studying the hydrodynamics of a single gas bubble flowing through stationary liquid phase. The natural breakup of bubble during its motion has been studied in the past. In the Part I of the present work, hydrodynamics of an air bubble after its artificial splitting using a stainless steel mesh is experimentally studied using image processing and high speed photography. The significance of bubble splitting is tha

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7

Popa, Simona, Andra Tamas, Vasile Simulescu, Dorin Jurcau, Sorina Boran, and Giannin Mosoarca. "A Novel Approach of Bioesters Synthesis through Different Technologies by Highlighting the Lowest Energetic Consumption One." Polymers 13, no. 23 (2021): 4190. http://dx.doi.org/10.3390/polym13234190.

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Fatty acids esters have a wide application as bioplasticizers and biolubricants in different industries, obtained mainly in classic batch reactors, through an equilibrium complex reaction, that involves high temperatures, long reaction times, vigorously stirring, and much energy consumption. To overcome these shortcomings, we synthesized a series of fatty acid esters (soybean oil fatty acids being the acid components with various hydroxyl compounds) through novel low energy consumption technologies using a bubble column reactor, a microwave field reactor and for comparison meaning, a classic b

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8

Alattar, Saja A., Khalid A. Sukkar, and May A. Alsaffar. "The role of TiO2 NPs catalyst and packing material in removal of phenol from wastewater using an ozonized bubble column reactor." Acta Innovations, no. 46 (November 4, 2022): 93–105. http://dx.doi.org/10.32933/actainnovations.46.7.

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Phenol is present as a highly toxic pollutant in wastewater, and it has a dangerous impact on the environment. In the present research, the phenol removal from wastewater has been achieved using four treatment methods in a bubble column reactor (treatment by ozone only, using packed bubble column reactor with ozone, utilizing ozone with TiO2 NPs catalyst in the reactor without packing, and employing ozone with TiO2 NPs in the presence of packing). The effects of phenol concentration, ozone dosage, TiO2 NPs additions, and contact time on the phenol removal efficiency were determined. It was fou

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9

Mohagheghian, Shahrouz, Afshin J. Ghajar, and Brian R. Elbing. "Effect of Vertical Vibration on the Mixing Time of a Passive Scalar in a Sparged Bubble Column Reactor." Fluids 5, no. 1 (2020): 6. http://dx.doi.org/10.3390/fluids5010006.

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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) on the mixing time scale were investigated. The bubble-induced mixing was characterized by tracking the distribution of a passive scalar within a sparged swarm of bubbles. Void fraction and bubble size distribution were also measured at each test condition. Without vibrations (static), the bubble column operated in the homogenous regime and the

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10

Yavorskyy, Alexander, Oksana Shvydkiv, Carolin Limburg, Kieran Nolan, Yan M. C. Delauré, and Michael Oelgemöller. "Photooxygenations in a bubble column reactor." Green Chemistry 14, no. 4 (2012): 888. http://dx.doi.org/10.1039/c2gc16439f.

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11

Li, Guiyong, Guanghui Chen, and Jihai Duan. "Simulation Study on Hydrodynamic Performance of Slurry Bubble Column with Vertical Tube Internals." Journal of Physics: Conference Series 2549, no. 1 (2023): 012031. http://dx.doi.org/10.1088/1742-6596/2549/1/012031.

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Abstract The gas-liquid-solid mixing characteristics in slurry bubble column were studied using the CFD-PBM model under different cross section coverage ratios of tubes. The research shows that with the increase of the proportion of the cross section area of the vertical tube, the flow field in the slurry bubble column tends to be stable, the liquid phase flow rate in the column becomes faster, and the large-scale liquid circulation strengthens, resulting in the decrease of gas holdup. As the proportion of cross section area in the vertical column increases, the distribution of gas-solid holdu

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12

Ham, Phaly, Saret Bun, Pisut Painmanakul, and Kritchart Wongwailikhit. "Effective Analysis of Different Gas Diffusers on Bubble Hydrodynamics in Bubble Column and Airlift Reactors towards Mass Transfer Enhancement." Processes 9, no. 10 (2021): 1765. http://dx.doi.org/10.3390/pr9101765.

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Even bubble column reactors (BCR) and airlift reactors (ALR) have been developed in terms of various related aspects towards mass transfer enhancement, the effective analysis of gas diffuser types on mass transfer and gas–liquid hydrodynamic characteristics is still limited. Therefore, the present study aims to analyze the relative effect of different types of air diffusers on bubble hydrodynamics and mass transfer performance to understand their behaviors and define the best type. The experiments were conducted by varying different diffuser types, reactor types (BCR and ALR), and superficial

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13

Cooper-Baldock, Zachary, Thomas De La Perrelle, Callum Phelps, et al. "Preliminary Evaluation of Methods for Continuous Carbon Removal from a Molten Catalyst Bubbling Methane Pyrolysis Reactor." Energies 17, no. 2 (2024): 290. http://dx.doi.org/10.3390/en17020290.

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Methane pyrolysis in molten catalyst bubble (MCB) column reactors is an emerging technology that enables the simultaneous production of hydrogen and solid carbon, together with a mechanism for separating the two coproducts. In this process, methane is dispersed as bubbles into a high temperature molten catalyst bath producing hydrogen and low-density carbon, which floats to the surface of the bath from providing a means for them to be separated. However, the removal of carbon particulates from a bubbling column reactor is technically challenging due to the corrosive nature of the molten cataly

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14

Vlaev, Serafim D., and Jindřich Zahradník. "Energy effectiveness and working characteristics of different tower reactors for aerated slurry systems." Collection of Czechoslovak Chemical Communications 52, no. 11 (1987): 2624–39. http://dx.doi.org/10.1135/cccc19872624.

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Decisive hydrodynamic and mass transfer characteristics of different types of tower reactors (rotating disc reactor, single and multistage sieve-tray bubble columns, tower reactor with ejector gas distributor) as well as the energy effectiveness of their performance were compared with the purpose to establish a quantitative basis for the qualified choice of the proper reactor type according to demands of specific reaction processes. Selected design parameters included gas and solid phase holdup, kLaL, liquid phase residence time distribution, and axial distribution of the solid phase, the expe

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15

Khan, Arif, Samrana Sharif, A. N. K. Wardag, I. R. Chughtai, and M. H. Al-Dahhan. "CFD SIMULATION OF BUBBLE COLUMN REACTOR BY INVESTIGATING THE EFFECT OF TRAYS ON OVERALL GAS HOLDUP." Nucleus 46, no. 3 (2020): 161–66. https://doi.org/10.71330/nucleus.46.03.941.

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In the current research work, CFD model has been developed to estimate overall gas holdup for co-current air-water system in a Trayed Bubble Column Reactor (TBCR), operating in bubbly flow regime. The TBCR considered in this study has 19 cm inner diameter and 274 cm length. Unsteady 2d-axi symmetric, Eulerian-Eulerian multiphase model with segregated solver has been considered while turbulence effects are introduced by using generalized k-Îµ model with the option of each-phase turbulence model. The effect of trays has been studied on overall gas holdup while liquid superficial velocity, trayâ€

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16

Li, Yong Dan, Su Min Lu, and Qin Peng Guan. "A Review of Theoretical Research on Partial Parameters in Three-Phase Slurry Bubble Column Reactor." Advanced Materials Research 838-841 (November 2013): 2404–12. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.2404.

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Three-phase slurry bubble column reactor owns a wide application area. This review focuses on the hydrodynamics of the reactor from the findings of published studies, which includes the flow regimes, gas holdup, bubble size and distribution and mass transfer coefficients. The factors affecting each parameter and the status of the research are discussed, and the development of slurry bubble column reactor has also been prospected. At present, the experimental data that can be used in the industrial application is not accurate, an enlargement of the reactor is still a difficult problem, it remai

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17

Li, Nan, Mingchen Cao, Kun Xu, Jiabin Jia, and Hangben Du. "Ultrasonic Transmission Tomography Sensor Design for Bubble Identification in Gas-Liquid Bubble Column Reactors." Sensors 18, no. 12 (2018): 4256. http://dx.doi.org/10.3390/s18124256.

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Scientists require methods to monitor the distribution of gas bubbles in gas-liquid bubble column reactors. One non-destructive method that can potential satisfy this requirement in industrial situations is ultrasonic transmission tomography (UTT). In this paper, an ultrasonic transmission tomography sensor is designed for measuring bubble distribution in a reactor. Factors that influence the transducer design include transmission energy loss, the resonance characteristics and vibration modes of the transducer, and diffusion angles of the transducers, which are discussed. For practical applica

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18

Chatterjee, Sushovan, and Sanjoy Paul. "Simulation of Hydrodynamic Conditions of a Photobioreactor for Microalgae Cultivation." Applied Mechanics and Materials 592-594 (July 2014): 2427–31. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.2427.

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Under optimum environmental conditions, microalgae are able to accumulate significant amounts of lipids within diminutive span. They are therefore established as promising candidates for the production of biodiesel. In order to develop this, and also to cut down the cost parameter involving the production of biodiesel from algae, the growth rate of algae has to be enhanced. To maintain the proper condition for their growth, closed cultivation is the best option for which different types of reactor are used. Bubble column reactor, is one among them, where the mixing rate of algae with nutrients

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19

Yan, Luchun, Jiemin Liu, Zhenhua Feng, and Peng Zhao. "Continuous degradation of BTEX in landfill gas by the UV-Fenton reaction." RSC Advances 6, no. 2 (2016): 1452–59. http://dx.doi.org/10.1039/c5ra22585j.

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20

Shah, Yatish T., Sebastian Joseph, Dennis N. Smith, and John A. Ruether. "Two-bubble class model for churn turbulent bubble-column reactor." Industrial & Engineering Chemistry Process Design and Development 24, no. 4 (1985): 1096–104. http://dx.doi.org/10.1021/i200031a034.

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21

Ali Al-Naqqash, Hussein Reda Muhammad, Mohammed Alhwayzee, and Farhan Lafta Rashid. "Simulating the Rising Air Bubbles Stream through Heavy Fuel Oil Residue Bubble Column Reactor using COMSOL." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 121, no. 1 (2024): 70–84. http://dx.doi.org/10.37934/arfmts.121.1.7084.

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Several industrial operations rely on the rise of air bubbles through heavy fuel oil residue (HFOr), including oil recovery and wastewater treatment. In order to increase efficiency and decrease expenses, it is necessary to understand the peculiarities of this process. With the help of COMSOL Multiphysics, we numerically simulate the ascent of a single air bubble via HFOr in this article. The dimensions of the container used in the simulations were (100) mm in diameter and (200) mm in height, with an air bubble diameter of 4.5 mm. For an air bubble ascending through an HFOr column, the predict

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22

Kulkarni, Amol A. "Lift force on bubbles in a bubble column reactor: Experimental analysis." Chemical Engineering Science 63, no. 6 (2008): 1710–23. http://dx.doi.org/10.1016/j.ces.2007.10.029.

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23

Roghair, Ivo. "Advanced Numerical Tools for Chemical Process Intensification: Innovations in 3D Printing, Membrane Reactors, and Bubble Dynamics." Resúmenes de Mecánica Computacional 1, no. 3 (2024): 29. https://doi.org/10.70567/rmc.v1i3.146.

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Chemical process intensification (CPI) is concerned with making innovations for chemical processes to make them smaller and faster, and more sustainable and efficient. Typically, CPI aims for utilizing and enforcing a synergy of the different chemical-physical processes in a reactor and involves a deep understanding of the reactor behavior and being able to control the different aspects of the reactor system. We therefore work on the development of digital twins for various reactor system types, along with experimental validation and verification. In this talk, I will give an overview of the n

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24

Ahmed, Maher Obaid, Jasim Ibrahim Humadi, Ahmad A. Aabid, et al. "CFD Assessment of the Bubble Flow in a 3D Rectangular Column." Applied Mechanics and Materials 914 (May 15, 2023): 67–82. http://dx.doi.org/10.4028/p-5515dd.

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The purpose of this research is to better understand the characteristics of two-phase flow in a rectangular bubble column. Computational Fluid Dynamics (CFD) (ANSYS-FLUENT R15.0®) has been used to conduct numerical studies of the flow pattern. Furthermore, the experimental data is used to verify the accuracy of the numerical data. This unique CFD simulation research included a 3D system, Reynolds-Average, Navier-Stokes equations (RANS), k-turbulence model, and total interphase forces. Bulk flow patterns were revealed through CFD analysis. Total contact force, both constant and non-steady, is a

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25

Bi, Jinghao, Weijun Qin, Dongjie Xie, Fan Xie, and Xiao Xu. "Modeling Wet Air Oxidation of Sodium Acetate in a Bubble Column." Processes 11, no. 10 (2023): 2926. http://dx.doi.org/10.3390/pr11102926.

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Scale-up bubble columns for wet air oxidation (WAO) represent a novel solution to the growing problem of sodium acetate-containing waste discharge. This study used an axial dispersion model to simulate a reactor at a high temperature of 320 °C. By minimizing the structure size and gas fed into the system, the estimated optimal reactor dimensions were obtained. At the optimized reactor diameter, total height, initial oxygen partial pressure, and superficial gas velocity of 1 m, 7 m, 40 bar, and 0.07 m/s, respectively, a degradation efficiency of over 90% was obtained, at which the residual conc

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26

Schäfer, R., C. Merten, and G. Eigenberger. "Bubble size distributions in a bubble column reactor under industrial conditions." Experimental Thermal and Fluid Science 26, no. 6-7 (2002): 595–604. http://dx.doi.org/10.1016/s0894-1777(02)00189-9.

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27

Waghmare, Y. G., C. A. Dorao, H. A. Jakobsen, F. Carl Knopf, and R. G. Rice. "Bubble Size Distribution for A Bubble Column Reactor Undergoing Forced Oscillations." Industrial & Engineering Chemistry Research 48, no. 4 (2009): 1786–96. http://dx.doi.org/10.1021/ie801375h.

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28

Zahradník, Jindřich, and Milan Rylek. "Design and scale-up of Venturi-tube gas distributors for bubble column reactors." Collection of Czechoslovak Chemical Communications 56, no. 3 (1991): 619–35. http://dx.doi.org/10.1135/cccc19910619.

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General principles of ejector distributors performance are surveyed and demonstrated for two particular cases of Venturi tubes commonly employed for gas dispersion in tower reactors with forced liquid circulation. Design recommendations for the two types of Venturi-tube gas distributors are presented and a general method is outlined for ejector distributors scale-up, based on the decisive effect of energy dissipation rate on the distributors performance. As an illustration, the specific case of Venturi-tube gas distributor design for an industrial reactor for catalytic hydrogenation of rape-se

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29

Ratnawati, Ratnawati, Dyah Arum Kusumaningtyas, Purbo Suseno, and Aji Prasetyaningrum. "Mass Transfer Coefficient of Ozone in a Bubble Column." MATEC Web of Conferences 156 (2018): 02015. http://dx.doi.org/10.1051/matecconf/201815602015.

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The effect of flow rate of ozone-containing gas and pH on the mass transfer coefficient of ozone through water in a bubble column reactor has been studied. Ozone was generated from air using a corona discharge ozone generator. The flow rate of air was varied from 2 to 5 L min-1, while pH was varied from 4 to 10. The gas containing ozone was bubbled to the reactor containing 1.5 L of 2% KI solution. The temperature was set at 28±1ºC. The concentration of ozone was determined using titrimetric method every 5 minutes. The results show that the concentration of ozone increases with time, and it re

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30

Chernyshev, Alexander, Alexander Schmidt, and Veronica Chernysheva. "An Impact of the Discrete Representation of the Bubble Size Distribution Function on the Flow Structure in a Bubble Column Reactor." Water 15, no. 4 (2023): 778. http://dx.doi.org/10.3390/w15040778.

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The purpose of the present study is to analyze the effect of different discrete representations of the continuous bubble size distribution function on the flow structure in a bubble column reactor. Poly- and monodisperse media were considered, such that the mathematical expectation of the bubble size in the polydisperse case was equal to the bubble size in the monodisperse case at the same volumetric bubble contents. For these computations the normalized variances of the velocity profiles of the carrier and the disperse phases, the volume fraction of the disperse phase, and the specific area o

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31

Soong, Y., F. W. Harke, I. K. Gamwo, R. R. Schehl, and M. F. Zarochak. "Hydrodynamic study in a slurry-bubble-column reactor." Catalysis Today 35, no. 4 (1997): 427–34. http://dx.doi.org/10.1016/s0920-5861(96)00211-8.

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32

Zhao, Rong, James G. Goodwin, and Rachid Oukaci. "Attrition assessment for slurry bubble column reactor catalysts." Applied Catalysis A: General 189, no. 1 (1999): 99–116. http://dx.doi.org/10.1016/s0926-860x(99)00261-6.

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33

Goharrizi, Ataallah Soltani, and Bahador Abolpour. "Modeling an industrial sodium bicarbonate bubble column reactor." Applied Petrochemical Research 4, no. 2 (2014): 235–45. http://dx.doi.org/10.1007/s13203-014-0064-z.

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Chen, Liang-Heng, and Hsueh-Chia Chang. "Non-linear stability of a bubble column reactor." Chemical Engineering Journal 30, no. 2 (1985): 103–9. http://dx.doi.org/10.1016/0300-9467(85)80013-7.

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35

Schäfer, Rainer, Clemens Merten, and Gerhart Eigenberger. "Autocatalytic Cyclohexane Oxidation in a Bubble Column Reactor." Canadian Journal of Chemical Engineering 81, no. 3-4 (2008): 741–48. http://dx.doi.org/10.1002/cjce.5450810354.

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Byun, S., S. H. Cho, J. Yoon, S. U. Geissen, A. Vogelpohl, and S. M. Kim. "Influence of mass transfer on the ozonation of wastewater from the glass fiber industry." Water Science and Technology 49, no. 4 (2004): 31–36. http://dx.doi.org/10.2166/wst.2004.0212.

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The mass transfer rate (kLa) is one of the most important parameters in the ozonation of wastewater, because it frequently constitutes the rate-determining step. This study investigated the influence of kLa on the ozonation of glass fiber wastewater using a high-performance jet loop reactor (HJLR), which is well known for its high mass transfer property, and compared the results of this investigation with those obtained using the bubble column reactor. It was found that the higher kLa achieved by increasing the energy input did not lead to higher ozonation efficiency, since the reaction involv

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Basha, Omar M., Li Weng, Zhuowu Men, and Badie I. Morsi. "CFD Modeling with Experimental Validation of the Internal Hydrodynamics in a Pilot-Scale Slurry Bubble Column Reactor." International Journal of Chemical Reactor Engineering 14, no. 2 (2016): 599–619. http://dx.doi.org/10.1515/ijcre-2015-0165.

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Abstract A multiphase-Eulerian, three-dimensional (3-D), computational fluid dynamics (CFD) model was built to investigate the local hydrodynamics of a pilot-scale (0.29 m ID, 3 m height) Slurry Bubble Column Reactor (SBCR). The model was first validated against the gas holdup radial profiles in an air-water-glass beads system obtained in a 0.254 m ID and 2.5 m height column under ambient conditions at various superficial gas velocities by Yu and Kim (Bubble characteristics in the radial direction of three-phase fluidized beds. AIChE Journal 34, 2069–2072, 1988). The model was next validated a

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Krishnamoorthy, Gautham, Rydell Klosterman, and Dylan Shallbetter. "A Radiative Transfer Modeling Methodology in Gas-Liquid Multiphase Flow Simulations." Journal of Engineering 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/793238.

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A methodology for performing radiative transfer calculations in computational fluid dynamic simulations of gas-liquid multiphase flows is presented. By considering an externally irradiated bubble column photoreactor as our model system, the bubble scattering coefficients were determined through add-on functions by employing as inputs the bubble volume fractions, number densities, and the fractional contribution of each bubble size to the bubble volume from four different multiphase modeling options. The scattering coefficient profiles resulting from the models were significantly different from

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Duan, Yan Ping, Sven Geissen, and Ling Chen. "Influence Parameters in the Ozonation of Clofibric Acid Using a Cascade Bubble Column." Advanced Materials Research 573-574 (October 2012): 538–41. http://dx.doi.org/10.4028/www.scientific.net/amr.573-574.538.

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Ozonation of clofibric acid (CA) in aqueous solution was carried out under continuous operation in a cascade bubble column. The influence of operation parameters including initial CA concentration, gas flow rate, liquid flow rate and pH on the removal of CA and TOC was investigated. The results indicated that ozonation could be used to effectively remove CA from water. Increasing the initial CA concentration resulted in a decrease of the CA and TOC removal efficiency. A comparison of CA removal efficiency and ozone utilization between cascade and conventional bubble column indicated that casca

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Jia, Mingsheng, Celia M. Castro-Barros, Mari K. H. Winkler, and Eveline I. P. Volcke. "Effect of organic matter on the performance and N2O emission of a granular sludge anammox reactor." Environmental Science: Water Research & Technology 4, no. 7 (2018): 1035–46. http://dx.doi.org/10.1039/c8ew00125a.

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Vandu, C. O., K. Koop, and R. Krishna. "Large Bubble Sizes and Rise Velocities in a Bubble Column Slurry Reactor." Chemical Engineering & Technology 27, no. 11 (2004): 1195–99. http://dx.doi.org/10.1002/ceat.200402126.

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Cheng, Hai‐Peng, Pei‐Ming Wang, Jech‐Wei Chen, and Wen‐Teng Wu. "Cultivation of Acetobacter xylinum for bacterial cellulose production in a modified airlift reactor." Biotechnology and Applied Biochemistry 35, no. 2 (2002): 125–32. http://dx.doi.org/10.1111/j.1470-8744.2002.tb01180.x.

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Acetobacter xylinum for bacterial cellulose production was cultivated in a modified airlift reactor. Better results were obtained from the modified reactor than from a conventional bubble column. After 72 h of cultivation, the final concentration of bacterial cellulose was 7.72 g/l and the productivity was 0.107 g/l per h in the modified airlift reactor. The concentration of bacterial cellulose was about three times higher than that produced in the conventional bubble column. Moreover, the bacterial cellulose produced using the modified reactor formed a unique elliptical pellet (the average di

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Tang, Ruishu, Chang Cui, Dagang Li, Dongxiang Zhang, Xiyan Xu, and Jinying Li. "CFD Simulation of Bubbling Process in Nitric Acid Solution in a Bubble Column." Journal of Physics: Conference Series 2329, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1742-6596/2329/1/012006.

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Abstract Bubble column is a commonly used multiphase reactor. Owing to the complicated nature of its flow structure, computational fluid dynamics has frequently been used as a useful instrument for studying the fluid mechanics in a bubble column. However, most of the previously studied systems are air-water system, while air-nitric acid solution system is rarely reported. In the present study, the differences in bubble size distribution of pure water and 1 mol/L nitric acid in the bubble column were observed through experiments. The bubble size was found to be smaller than that in water when t

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Chatterjee, Sushovan. "CFD analysis on hydrodynamic conditions of a designed spiral column photobioreactor for cultivation of microalgae." World Journal of Engineering 14, no. 5 (2017): 443–50. http://dx.doi.org/10.1108/wje-10-2016-0105.

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Purpose The purpose of this study is analysis on fluid flow characteristics inside a modified designed spiral bubble column photo-bioreactor. Available fluid dynamic simulation of bubble column reactor (BCR) (which is well-known conventional photobioreactor) had shown significance contribution over the past two decades, where the fluid dynamics of the culture medium and mixing will influence the average irradiance and the light regimen to which the cells are exposed. This enhances the growth. To develop this, and also to cut down the cost parameter involving the production of biodiesel from al

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Azimi Yancheshme, Amir, Jamshid Zarkesh, Davod Rashtchian, and Arezou Anvari. "CFD Simulation of Hydrodynamic of a Bubble Column Reactor Operating in Churn-Turbulent Regime and Effect of Gas Inlet Distribution on System Characteristics." International Journal of Chemical Reactor Engineering 14, no. 1 (2016): 213–24. http://dx.doi.org/10.1515/ijcre-2014-0178.

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AbstractCFD simulation of cylindrical bubble column including air as dispersed phase and water as continuous phase operating in churn-turbulent flow regime with diameter of 0.49 m, height of 3.6 m and gas superficial velocity of 0.14 m/s have been conducted. All simulations have been carried out in a 2D axisymmetric, unsteady and Euler/Euler framework with the aid of commercial software FLUENT v. 14.5. Simulations were validated by our experimental results through residence time distribution (RTD) data. Effect of bubble size distribution at inlet on column hydrodynamic was investigated and res

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Sastaravet, Prajak, Saret Bun, Kritchart Wongwailikhit, Nattawin Chawaloesphonsiya, Manabu Fujii, and Pisut Painmanakul. "Relative Effect of Additional Solid Media on Bubble Hydrodynamics in Bubble Column and Airlift Reactors towards Mass Transfer Enhancement." Processes 8, no. 6 (2020): 713. http://dx.doi.org/10.3390/pr8060713.

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Many researchers have focused on multi-phase reactor development for improving mass transfer performance. However, solid particle addition in gas–liquid contactor for better oxygen mass transfer performance is still limited. Hence, this study aims to analyze the relative effect of different types of local solid media on the bubble hydrodynamic characteristics towards mass transfer enhancement in bubble columns (BCR) and airlift reactors (ALR). This was investigated by varying solid media types (ring, sphere, cylinder, and square), solid loadings (0%–15%), and superficial gas velocities (Vg) (2

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Alzuhairi, Mohammed, Hanaa Al-Kaisy, and Mena Khdheer. "Depolymerization of Waste Plastic Using Bubble Column for Nano Alumina Blended Coating." Fluids 7, no. 4 (2022): 127. http://dx.doi.org/10.3390/fluids7040127.

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In this study, we aimed to figure out how the depolymerization of polyethylene terephthalate produces monomers, dimers, trimers, and other oligomers of bis (2-hydroxyethyl) terephthalate. Polymerization was achieved in a bubble column reactor with 0.05 wt% 40–50 nm magnesium oxide nanoparticle as a catalyst. A bubble column reactor was used to perform the recycling process at the boiling point of ethylene glycol and atmospheric pressure. Depolymerized polyethylene terephthalate (DPET) was mixed with poly(methyl methacrylate) and reinforced with 1% Nano Al2O3. The nanoparticles acted as a compo

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Abdulrazzaq, Burhan S. "Liquid-Phase Back mixing in Bubble Columns." Tikrit Journal of Engineering Sciences 17, no. 4 (2010): 10–20. http://dx.doi.org/10.25130/tjes.17.4.02.

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Liquid-phase axial dispersion coefficients have been measured for air-water system in bubble columns of 10, 15 and 30 cm diameter. The experiments are carried out using a transient method (the tracer response method). Dispersion coefficient is obtained by adjusting the experimental profiles of tracer concentration with the predictions of the model. The experimental results show that one-dimensional axial dispersion coefficient, Dax,L, reveal strong scale dependence. Backmixing of liquid phase increases with the increase of reactor diameter and superficial gas velocity. Axial dispersion coeffic

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Blanco, Antonio, Alicia García-Abuín, Diego Gómez-Díaz, and Jose M. Navaza. "Chemical Reaction Effect upon Gas–Liquid Interfacial Area in a Bubble Column Reactor." International Journal of Chemical Reactor Engineering 11, no. 1 (2013): 587–93. http://dx.doi.org/10.1515/ijcre-2012-0075.

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Abstract This work analyses the influence of different experimental conditions over important hydrodynamic parameters of a bubble column reactor, such as bubble size distribution, gas hold-up and the gas–liquid interfacial area. The influence of gas flow-rate (18–40 L h–1) and reagent concentration (0–0.5 mol L–1) in the liquid phase upon these hydrodynamic parameters have been studied. The influence of experiment time must also be taken into account due to non-steady-state regime. Under these considerations, the chemical absorption rate changes throughout time, and it produces important chang

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Storm, Dietmar, and Ralf Köpsel. "Modelling of catalytic coal hydrogenation in a bubble column reactor: 2. Model calculations of bubble column cascades." Fuel 71, no. 6 (1992): 681–88. http://dx.doi.org/10.1016/0016-2361(92)90172-k.

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