Impinging-Jet Ozone Bubble Column Modeling: Hydrodynamics, Gas Hold-up, Bubble Characteristics, and Ozone Mass Transfer

Baawain, Mahad; El-Din, Mohamed Gamal; Clarke, K.; Smith, Daniel

doi:10.1080/01919510701451441

Cited by 10 publications

(2 citation statements)

References 36 publications

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“…Versatility in applications has been well proved for Venturis. Venturis have been suggested to be as gas absorption devices (Bauer et al, 1963;Zhou and Smith, 2000;Baawain et al, 2007), bubble generators or gas distributors (Kress, 1972;Huynh et al, 1991;Briens et al, 1992;Havelka et al, 2000;Kawamura et al, 2004), and chemical reactors for the fast reaction inside (Cramers and Beenackers, 2001;Gourich et al, 2005). Liquid-driven type Venturi is often used as gas-inducing devices, such as bubble generators and gas distributors, while gas-driven type Venturi is used as scrubbers (Ali et al, 2013;Gulhane et al, 2015;Zhou et al, 2016;Bal et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

A review on bubble generation and transportation in Venturi-type bubble generators

Huang

Sun

Liu

et al. 2019

Exp. Comput. Multiph. Flow

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Venturi-type bubble generators own advantages of simplicity in structure, high efficiency, low power consumption, and high reliability, exhibiting a broad application potential in various fields. This work presents a literature review of recent progress in the research concerning Venturi-type bubble generators, with a focus on the performance evaluation, bubble transportation, and breakup mechanisms. Experimental studies employing flow visualization techniques have played an important role in exploring the bubble transportation and breakup phenomena, which is vitally necessary for clarifying the bubble breakup mechanisms and understanding the working principle and performance of a Venturi channel as a bubble generator. A summarization was carried out on both experimental and theoretical work concerning parameters influencing the bubble breakup and the performance of Venturi-type bubble generators. Based on the geometric parameter optimization combined with appropriate flow conditions, it is expected that Venturi-type bubble generators can produce bubbles with controllable size and concentration to satisfy the application requirements, while a further work is required to illustrate the interaction between the liquid and gas bubbles.

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Section: Introductionmentioning

confidence: 99%

A review on bubble generation and transportation in Venturi-type bubble generators

Huang

Sun

Liu

et al. 2019

Exp. Comput. Multiph. Flow

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“…Information about the dynamic ozonation processes is still scarce. It should be noted, incidentally, that the dynamic modeling for the systems, in which only ozone mass transfer and ozone decomposition occur and the ozonation of pollutants is not included, has also been studied using an axial-dispersion model or a tanks-in-series model. ,, Of course, an axial-dispersion model and a tanks-in-series model have been also applied to discuss the steady-state performance of ozonation process in a bubble column. ,, …”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling and Simulation of Ozonation in a Semibatch Bubble Column Reactor: Decolorization and Mineralization of Azo Dye Orange II by Ozone

Tokumura

Katoh

Ohata

et al. 2009

Ind. Eng. Chem. Res.

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Ozone decolorization and mineralization of azo dye Orange II were examined. In order to elucidate the dynamics of the oxidation process by ozone, the rate-based model consisting of the rates of chemical reaction and gas−liquid mass transfer was developed. The overall enhancement factor was introduced to correct the underestimation of mass transfer driving force for fast reactions. In modeling, nonideal mixing characteristics in the gas and liquid phases were described using a tanks-in-series model with backflow. The parameters in the proposed mixing model were determined on the basis of a multiple circulation cell model and a velocity profile of recirculatory flow in a bubble column. Experiments for decolorization and mineralization of Orange II were performed to verify the capability of the proposed model in a semibatch bubble column. The decolorization completed rather quickly. However, the mineralization characterized by the total organic carbon (TOC) was incomplete and its rate was rather slow. It was found that the decolorization rate decreased with the increase in the initial Orange II concentration and increased with increasing ozone gas injection rate, ozone dosage, and solution pH. The proposed model could reasonably describe the present experimental results for the dynamic changes and the steady state of decolorization, mineralization, dissolved ozone concentration, and ozone concentration in the outlet gas. The proposed model might effectively handle the prediction of ozone oxidation process in a semibatch bubble column.

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Modelling approaches to ozone processing of liquid foods

Cullen¹,

Tiwari

O’Donnell

et al. 2009

Trends in Food Science & Technology

133

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Impinging-Jet Ozone Bubble Column Modeling: Hydrodynamics, Gas Hold-up, Bubble Characteristics, and Ozone Mass Transfer

Cited by 10 publications

References 36 publications

A review on bubble generation and transportation in Venturi-type bubble generators

A review on bubble generation and transportation in Venturi-type bubble generators

Dynamic Modeling and Simulation of Ozonation in a Semibatch Bubble Column Reactor: Decolorization and Mineralization of Azo Dye Orange II by Ozone

Modelling approaches to ozone processing of liquid foods

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