Hydrodynamics and gas-liquid mass transfer in an oscillatory flow reactor: Influence of liquid properties.
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| Title: | Hydrodynamics and gas-liquid mass transfer in an oscillatory flow reactor: Influence of liquid properties. |
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| Authors: | Almeida, F.1,2 (AUTHOR), Rocha, F.1,2 (AUTHOR), Teixeira, J.A.3,4 (AUTHOR), Ferreira, A.1,2 (AUTHOR) antonio@fe.up.pt |
| Source: | Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A. May2023, Vol. 193, p179-197. 19p. |
| Subjects: | Mass transfer coefficients, Mass transfer, Bubbles, Hydrodynamics, Bubble dynamics, Surface tension, Liquids |
| Abstract: | Liquid properties, such as, surface tension and viscosity are important parameters as they control gas-liquid mass transfer in bioprocesses. An oscillatory flow reactor provided with smooth periodic constrictions (OFR-SPC) was considered to evaluate its potential for mass transfer performance in non-pure gas-liquid systems. The effect of surface tension and viscosity on the volumetric ( k L a) and liquid-side mass transfer coefficients (k L), interfacial area, (a), gas holdup (ε G) and bubbles' dynamics were investigated under different operational conditions (oscillation amplitude (x 0) and frequency (f) and superficial gas velocity (u g)). Two liquid phases, ethanol and sucrose aqueous solutions covering a range of surface tension and viscosity values were used. For the bubble size distribution (BSD) measurements an image analysis technique was used. A Design of Experiment (DoE) methodology was implemented in this work to establish the relation of x 0 , f , u g , surface tension and viscosity with k L a. According to the results, changes in the liquid properties and operational conditions showed marked effects on bubble's size and mass transfer. However, surface tension and viscosity had no significant influence on ε G , contrary to the reported for common contactors, where ε G increased in the presence of ethanol and decreased at moderate/high viscosities. Moreover, it was found that increasing the oscillatory movement notably improved k L , and k L a (2–6-fold), either in ethanol or sucrose solutions, compared to common reactors, even with moderate power consumption (∼ 105 W m−3). This improvement resulted from the bubbles' breakage, which originates bubbles with small and approximately the same size (homogeneous regime) enhancing a , instead, lower oscillations resulted in large bubbles (heterogeneous regime). The results demonstrate that the OFR-SPC can ensure outstanding mass transfer rates, with potential and feasibility for use in gas-liquid bioprocesses, where mass transfer and liquid properties are important. [Display omitted] • Mass transfer in the OFR-SPC was higher than in the conventional gas-liquid contactors, with moderate power consumption. • An increase in oscillatory conditions improves mass transfer. • For viscous medium, an oscillation increase originates a modal BSD, compared to bubble column. • Higher oscillations decrease k L in the presence of ethanol, in opposite to sucrose solutions. • The addition of ethanol or sucrose barely affected gas holdup in the OFR-SPC face to common gas-liquid contactors. [ABSTRACT FROM AUTHOR] |
| Copyright of Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 163514030 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Hydrodynamics and gas-liquid mass transfer in an oscillatory flow reactor: Influence of liquid properties. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Almeida%2C+F%2E%22">Almeida, F.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rocha%2C+F%2E%22">Rocha, F.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Teixeira%2C+J%2EA%2E%22">Teixeira, J.A.</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ferreira%2C+A%2E%22">Ferreira, A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> antonio@fe.up.pt</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Research+%26+Design%3A+Transactions+of+the+Institution+of+Chemical+Engineers+Part+A%22">Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A</searchLink>. May2023, Vol. 193, p179-197. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Mass+transfer+coefficients%22">Mass transfer coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Bubbles%22">Bubbles</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Bubble+dynamics%22">Bubble dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+tension%22">Surface tension</searchLink><br /><searchLink fieldCode="DE" term="%22Liquids%22">Liquids</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Liquid properties, such as, surface tension and viscosity are important parameters as they control gas-liquid mass transfer in bioprocesses. An oscillatory flow reactor provided with smooth periodic constrictions (OFR-SPC) was considered to evaluate its potential for mass transfer performance in non-pure gas-liquid systems. The effect of surface tension and viscosity on the volumetric ( k L a) and liquid-side mass transfer coefficients (k L), interfacial area, (a), gas holdup (ε G) and bubbles' dynamics were investigated under different operational conditions (oscillation amplitude (x 0) and frequency (f) and superficial gas velocity (u g)). Two liquid phases, ethanol and sucrose aqueous solutions covering a range of surface tension and viscosity values were used. For the bubble size distribution (BSD) measurements an image analysis technique was used. A Design of Experiment (DoE) methodology was implemented in this work to establish the relation of x 0 , f , u g , surface tension and viscosity with k L a. According to the results, changes in the liquid properties and operational conditions showed marked effects on bubble's size and mass transfer. However, surface tension and viscosity had no significant influence on ε G , contrary to the reported for common contactors, where ε G increased in the presence of ethanol and decreased at moderate/high viscosities. Moreover, it was found that increasing the oscillatory movement notably improved k L , and k L a (2–6-fold), either in ethanol or sucrose solutions, compared to common reactors, even with moderate power consumption (∼ 105 W m−3). This improvement resulted from the bubbles' breakage, which originates bubbles with small and approximately the same size (homogeneous regime) enhancing a , instead, lower oscillations resulted in large bubbles (heterogeneous regime). The results demonstrate that the OFR-SPC can ensure outstanding mass transfer rates, with potential and feasibility for use in gas-liquid bioprocesses, where mass transfer and liquid properties are important. [Display omitted] • Mass transfer in the OFR-SPC was higher than in the conventional gas-liquid contactors, with moderate power consumption. • An increase in oscillatory conditions improves mass transfer. • For viscous medium, an oscillation increase originates a modal BSD, compared to bubble column. • Higher oscillations decrease k L in the presence of ethanol, in opposite to sucrose solutions. • The addition of ethanol or sucrose barely affected gas holdup in the OFR-SPC face to common gas-liquid contactors. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.cherd.2023.03.030 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 179 Subjects: – SubjectFull: Mass transfer coefficients Type: general – SubjectFull: Mass transfer Type: general – SubjectFull: Bubbles Type: general – SubjectFull: Hydrodynamics Type: general – SubjectFull: Bubble dynamics Type: general – SubjectFull: Surface tension Type: general – SubjectFull: Liquids Type: general Titles: – TitleFull: Hydrodynamics and gas-liquid mass transfer in an oscillatory flow reactor: Influence of liquid properties. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Almeida, F. – PersonEntity: Name: NameFull: Rocha, F. – PersonEntity: Name: NameFull: Teixeira, J.A. – PersonEntity: Name: NameFull: Ferreira, A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 02638762 Numbering: – Type: volume Value: 193 Titles: – TitleFull: Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A Type: main |
| ResultId | 1 |
