Gas-Bubble Columns for Gas-Liquid Contacting

Shulman, H. L.; Molstad, M. C.

doi:10.1021/ie50486a017

Cited by 74 publications

(34 citation statements)

References 7 publications

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“…Several authors have stated that the volumetric mass transfer coefficients for the absorption and desorption processes of CO 2 to and from water are equivalent since both processes are considered as purely physical as opposed to chemical processes, such as desorption/absorption of CO 2 to and from diethylamine (DEA) where absorption/desorption is accompanied by chemical reaction. On the other hand, several other authors have reported differences between desorption and absorption rates and their respective volumetric mass transfer coefficients.…”

Section: Resultsmentioning

confidence: 99%

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Absorption and desorption of carbon dioxide in several water types

Al‐Hindi

Azizi

2017

Can J Chem Eng

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This study investigated the effect of water type on the rate of CO 2 transfer from/to an aqueous phase with varying degree of water salinity. The absorption and desorption experiments were conducted on reverse osmosis product, brackish well, and brackish water reverse osmosis reject waters as well as seawater in a mechanically agitated tank. Results show that the direction of mass transfer has a major impact on the value of the volumetric mass transfer coefficient, k L a, with the absorption experiments always rendering higher values. Furthermore, k L a values always decreased with salinity in both absorption and desorption experiments until a certain critical salinity value was reached, beyond which mass transfer increased again. However, k L a values were found to decrease continuously with an increase in the water alkalinity in absorption experiments, while no clear conclusion could be drawn for the alkalinity effect in the case of desorption experiments. These observations suggest that the effect of alkalinity should be further investigated to elucidate its impact along with the salinity on the volumetric mass transfer rate.

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Section: Resultsmentioning

confidence: 99%

“…Henry's constant equation is used for all four types of water, is applicable for 0 8C < T < 40 8C and 0 < S < 40 g/kg, and is taken from Weiss: [24] ln H CO2 ¼ À60:24 þ 93: 45 100…”

mentioning

confidence: 99%

Absorption and desorption of carbon dioxide in several water types

Al‐Hindi

Azizi

2017

Can J Chem Eng

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“…As the influence of the operating pressure is discussed in another section (Section 2.2.1), we here discuss the influence of the gas employed. Apart from Shulman and Molstadz [171]-who reported no effect of the gas properties-the literature agrees that, in columns of at least d c = 0.15 m, higher ρ G result in higher ε G [56]; a variation in ρ G means a variation in the residence time of the dispersed phase [114]. Also, the influence of ρ G over ε G has frequently been attributed to differences in bubble size distributions at the gas sparger [166,168,173].…”

Section: Influence Of Gas Propertiesmentioning

confidence: 88%

“…Generally, the influence of the gas phase over ε G is discussed in terms of the gas density (ρ G ) [169]. A variation in the gas density may result from high pressure operation [2, 56,84,89,94,114,169,170], from the use of different gases [47,80,89,94,107,166,168,169,[171][172][173] or from a combination of both [89,94,169]. As the influence of the operating pressure is discussed in another section (Section 2.2.1), we here discuss the influence of the gas employed.…”

Section: Influence Of Gas Propertiesmentioning

confidence: 99%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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We present a comprehensive literature review on the two-phase bubble column; in this review we deeply analyze the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer phenomena. First, we discuss the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer. We also discuss how the operating parameters (i.e., pressure, temperature, and gas and liquid flow rates), the operating modes (i.e., the co-current, the counter-current and the batch modes), the liquid and gas phase properties, and the design parameters (i.e., gas sparger design, column diameter and aspect ratio) influence the flow regime transitions and the fluid dynamics parameters. Secondly, we present the experimental techniques for studying the global and local fluid dynamic properties. Finally, we present the modeling approaches to study the global and local bubble column fluid dynamics, and we outline the major issues to be solved in future studies.

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“…As such, an important number of investigations regarding bubble columns are concerned with the experimental determination of one of the above parameters. [2][3][4] The interfacial area is a fundamental parameter in the design of absorption equipment on the industrial scale because the knowledge of this parameter is necessary for calculating individual mass-transfer coefficients. The value of the interfacial area can vary depending on the kind of contact device, the physical and chemical properties of gas-liquid systems, and the operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Determination of Interfacial Areas in a Bubble Column by Different Chemical Methods

Vázquez

Cancela

Riverol

et al. 2000

Ind. Eng. Chem. Res.

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We determined interfacial gas-liquid areas for the absorption of CO 2 or O 2 in a bubble column, with and without surfactants and/or sucrose in the absorbent liquid. All the experiments were carried out under batch processing conditions. The values obtained by the three chemical methods used have been compared, and the dependence of the operating conditions and physical properties on the interfacial area has also been analyzed. The results of experiments to determine the dependence of the area on the geometrical characteristics of the column and physical properties were fitted to within an 8% error by dimensionless modules.

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Gas-Bubble Columns for Gas-Liquid Contacting

Cited by 74 publications

References 7 publications

Absorption and desorption of carbon dioxide in several water types

Absorption and desorption of carbon dioxide in several water types

Two-Phase Bubble Columns: A Comprehensive Review

Determination of Interfacial Areas in a Bubble Column by Different Chemical Methods

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