Free-convection mass transfer behaviour of a vertical array of horizontal cylinders in relation to electrochemical reactor design

Ebrahim, Mahsa; Mansour, I.A.S.; Sedahmed, G.H.

doi:10.1016/0376-4583(84)90031-1

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…The natural flow type reactor has an important contribution in predicting diffusion-controlled electrochemical process. 86 In this type of flow, the bubbles detach from the surface of the electrode once the gravitational buoyancy force exceeds the interfacial surface tension force between electrode-gas interphase; then the density difference between the electrolyte and the bubbles interphase causes buoyancyinduced flow that drives the bubbles inside the bulk. Mat and Aldas, 2005 87 investigated the natural convection flow pattern applications, and reported the gas release rate from the electrode surface increases as the current density increases.…”

Section: Effect Of Bulk Flow On Bubblesmentioning

confidence: 99%

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Taqieddin

Nazari

Rajić

et al. 2017

J. Electrochem. Soc.

116

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Electrochemical systems suffer from poor management of evolving gas bubbles. Improved understanding of bubbles behavior helps to reduce overpotential, save energy and enhance the mass transfer during chemical reactions. This work investigates and reviews the gas bubbles hydrodynamics, behavior, and management in electrochemical cells. Although the rate of bubble growth over the electrode surface is well understood, there is no reliable prediction of bubbles break-off diameter from the electrode surface because of the complexity of bubbles motion near the electrode surface. Particle Image Velocimetry (PIV) and Laser Doppler Anemometry (LDA) are the most common experimental techniques to measure bubble dynamics. Although the PIV is faster than LDA, both techniques are considered expensive and time-consuming. This encourages adapting Computational Fluid Dynamics (CFD) methods as an alternative to study bubbles behavior. However, further development of CFD methods is required to include coalescence and break-up of bubbles for better understanding and accuracy. The disadvantages of CFD methods can be overcome by using hybrid methods. The behavior of bubbles in electrochemical systems is still a complex challenging topic which requires a better understanding of the gas bubbles hydrodynamics and their interactions with the electrode surface and bulk liquid, as well as between the bubbles itself.

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Section: Effect Of Bulk Flow On Bubblesmentioning

confidence: 99%

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Taqieddin

Nazari

Rajić

et al. 2017

J. Electrochem. Soc.

116

View full text Add to dashboard Cite

show abstract

“…The natural flow has an important contribution in predicting the diffusioncontrolled electrochemical processes [140]. In this type of flow, the bubbles detach from the surface of the electrode once the gravitational buoyancy force exceeds the interfacial surface tension force between electrode-gas interphase; then the density difference between the electrolyte and the bubbles interphase causes a buoyancy induced flow driving the bubbles inside the bulk electrolyte.…”

Section: Physicochemical Hydrodynamics At the Electrode Surfacementioning

confidence: 99%

Modeling of bubbles hydrodynamics and mass transfer in electrochemical gas-evolving systems

Taqieddin¹

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Free-convection mass transfer behaviour of a vertical array of horizontal cylinders in relation to electrochemical reactor design

Cited by 2 publications

References 14 publications

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Review—Physicochemical Hydrodynamics of Gas Bubbles in Two Phase Electrochemical Systems

Modeling of bubbles hydrodynamics and mass transfer in electrochemical gas-evolving systems

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