Mass Transfer Enhancement by Small Flow Obstacles in Electrochemical Cells

Fischl, D. S.; Hanson, Kristi L.; Müller, Rolf; Tobias, Charles W.

doi:10.1080/00986448508911306

Cited by 17 publications

(6 citation statements)

References 27 publications

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“…Van der Waal and Racz [4] have demonstrated experimentally that corrugations on the membrane surface improve back-mixing, provided that they are not too close together. Similar results have been reported for electrochemical cells with obstacles creating mixing [5][6][7][8].…”

Section: Introductionsupporting

confidence: 89%

Optimization of commercial net spacers in spiral wound membrane modules

Meindersma

Haan

et al. 2002

Journal of Membrane Science

232

121

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CFD simulations have been used to determine mass transfer coefficients and power consumption of commercial net spacers. The simulations show transversal and longitudinal vortices, vortex shedding and instationary flow behavior leading to the enhanced mass transfer in spacer filled-channels compared to empty channels. The results of the simulations were validated with experiments and compared with data reported in literature, showing satisfactory agreement. Furthermore, CFD simulations were used to optimize the geometry of commercial net spacers in terms of mass transfer and power consumption. The performance of these optimized spacer geometries will be used as reference for future work on the development of new high-performance spacer shapes.

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Section: Introductionsupporting

confidence: 89%

Optimization of commercial net spacers in spiral wound membrane modules

Meindersma

Haan

et al. 2002

Journal of Membrane Science

232

121

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“…Fig. 7 shows also that the present data is much lower than the data obtained by Fischl et al [34], especially under the optimum conditions reported by the authors; the authors used parallel obstacles, e.g. square and cylindrical plastic rods mounted on the electrode surface normal to the direction of electrolyte flow.…”

Section: Single-phase Mass Transfercontrasting

confidence: 72%

Liquid‐Solid Mass Transfer Behavior of a Vertical Array of Closely Spaced Horizontal Tubes in Relation to Catalytic and Electrochemical Reactor Design

et al. 2009

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The rates of mass transfer at a vertical array of closely spaced horizontal tubes were measured by the limiting-current technique under single-phase flow, gas sparging and two-phase flow. . For two-phase flow, the gas flow was found to enhance the rate of array mass transfer by a factor ranging from 1.25 to 5.25, depending on Re g and Re. The enhancement ratio increases with decreasing Re and increasing Re g . For Re ≥ 2500, the rate of mass transfer approaches the value of single-phase flow, regardless of the value of Re g , which ranged from 7 to 41. The importance of the present geometry in building electrochemical and catalytic reactors, where exothermic liquid-solid diffusion-controlled reactions take place, is highlighted. The present geometry offers the advantage that the outer surface acts as a turbulence promoter while the inner surface acts as a heat exchanger.

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“…Hanson [20] and Fisch! [18,19] did similar experiments for smaller slabs placed normal to the flow. These obstacles were both larger and smaller than the diffusion boundary layer thickness.…”

Section: Flow A_-:;nd 3-d Obstaclesmentioning

confidence: 89%

“…It may be supposed, based on the work of Fischl [18] and cell is not an artifact. The only explanation that seems plausible for this curious striation-related behavior, is that the concomitant hydrogen evolution (calculated above to be 0.9 mA/cm 2) somehow prevents the development of abundant zinc nuclei.…”

Section: A Phenomenological Theory Of Striation Emergencementioning

confidence: 98%

Micro-scale mass-transfer variations during electrodeposition

Sutija¹

1991

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Mass Transfer Enhancement by Small Flow Obstacles in Electrochemical Cells

Cited by 17 publications

References 27 publications

Optimization of commercial net spacers in spiral wound membrane modules

Optimization of commercial net spacers in spiral wound membrane modules

Liquid‐Solid Mass Transfer Behavior of a Vertical Array of Closely Spaced Horizontal Tubes in Relation to Catalytic and Electrochemical Reactor Design

Micro-scale mass-transfer variations during electrodeposition

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