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The behavior of hydrogen bubble flow in the MHD channel composed of platinum electrode.

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Title: The behavior of hydrogen bubble flow in the MHD channel composed of platinum electrode.
Authors: Li, Yan-Hom1 (AUTHOR) athomeli@ccit.ndu.edu.tw, Lin, Yi-Pin1 (AUTHOR)
Source: International Journal of Hydrogen Energy. Jan2025, Vol. 99, p494-503. 10p.
Subjects: Platinum electrodes, Laminar flow, Transition flow, Lorentz force, Reynolds number
Abstract: This study determines the behavior of hydrogen bubbles in a magnetohydrodynamic (MHD) channel that is equipped with platinum electrodes. The experiment analyzes the effects of varying inter-electrode distances (10 mm, 15 mm, and 20 mm) and different electrical current intensities (0.2A–3A) on bubble flow patterns within the channel. The flow transitions through laminar, transitional, and breaking down regions are affected by the Lorentz force. The results show that narrower electrode spacing promotes laminar flow, while wider spacing induces turbulence. Optimal hydrogen collection is obtained if the Lorentz force Reynolds number (Re L) is between 900 and 1300. The maximum Faradaic Efficiency (FE) occurs at 0.2A for all MHD configurations, with a value of 13.7% at 15 mm inter-electrode distance, but decreases at higher currents when an excessive number of bubbles accumulate and resistance increases. These results show that current intensity and electrode spacing must be optimized to ensure efficient hydrogen production and purity. • Narrow electrode gaps stabilize laminar flow; wider gaps increase bubble mixing. • The Lorentz force enhances bubble detachment and alters flow dynamics. • Optimal hydrogen purity occurs at Reynolds number (Re L) between 900 and 1300. • Faradaic efficiency peaks at 13.7% at 0.2A with 15 mm electrode spacing. • Balance electrode spacing and current for production efficiency and purity. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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
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Header DbId: egs
DbLabel: Engineering Source
An: 182183919
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: The behavior of hydrogen bubble flow in the MHD channel composed of platinum electrode.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Yan-Hom%22">Li, Yan-Hom</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> athomeli@ccit.ndu.edu.tw</i><br /><searchLink fieldCode="AR" term="%22Lin%2C+Yi-Pin%22">Lin, Yi-Pin</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Jan2025, Vol. 99, p494-503. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Platinum+electrodes%22">Platinum electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Laminar+flow%22">Laminar flow</searchLink><br /><searchLink fieldCode="DE" term="%22Transition+flow%22">Transition flow</searchLink><br /><searchLink fieldCode="DE" term="%22Lorentz+force%22">Lorentz force</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+number%22">Reynolds number</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study determines the behavior of hydrogen bubbles in a magnetohydrodynamic (MHD) channel that is equipped with platinum electrodes. The experiment analyzes the effects of varying inter-electrode distances (10 mm, 15 mm, and 20 mm) and different electrical current intensities (0.2A–3A) on bubble flow patterns within the channel. The flow transitions through laminar, transitional, and breaking down regions are affected by the Lorentz force. The results show that narrower electrode spacing promotes laminar flow, while wider spacing induces turbulence. Optimal hydrogen collection is obtained if the Lorentz force Reynolds number (Re L) is between 900 and 1300. The maximum Faradaic Efficiency (FE) occurs at 0.2A for all MHD configurations, with a value of 13.7% at 15 mm inter-electrode distance, but decreases at higher currents when an excessive number of bubbles accumulate and resistance increases. These results show that current intensity and electrode spacing must be optimized to ensure efficient hydrogen production and purity. • Narrow electrode gaps stabilize laminar flow; wider gaps increase bubble mixing. • The Lorentz force enhances bubble detachment and alters flow dynamics. • Optimal hydrogen purity occurs at Reynolds number (Re L) between 900 and 1300. • Faradaic efficiency peaks at 13.7% at 0.2A with 15 mm electrode spacing. • Balance electrode spacing and current for production efficiency and purity. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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.ijhydene.2024.12.224
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 494
    Subjects:
      – SubjectFull: Platinum electrodes
        Type: general
      – SubjectFull: Laminar flow
        Type: general
      – SubjectFull: Transition flow
        Type: general
      – SubjectFull: Lorentz force
        Type: general
      – SubjectFull: Reynolds number
        Type: general
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      – TitleFull: The behavior of hydrogen bubble flow in the MHD channel composed of platinum electrode.
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            NameFull: Li, Yan-Hom
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            NameFull: Lin, Yi-Pin
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            – D: 20
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
          Identifiers:
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              Value: 03603199
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              Value: 99
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            – TitleFull: International Journal of Hydrogen Energy
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