Electroosmotic flow through polymer electrolyte membranes in PEM fuel cells

Karimi, Gholamreza; Li, X.

doi:10.1016/j.jpowsour.2004.08.018

Cited by 82 publications

(52 citation statements)

References 22 publications

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“…13,14 The velocity field integrated with heat transfer for Newtonian systems has been studied by various researchers in micro-chip cooling, 15,16 microscale heat exchanger, 17 micro-electronic-mechanical-systems (MEMS), 18 microreactors, 19 etc. The corresponding mass transfer problems have applications in transdermal drug delivery, 20,21 electrolyte transport in fuel cells, 22 transport in hydrogel, 23 electrokinetic separation, 24 etc. These applications include study of transport processes involving both fluid flow and mass transfer in a microchannel with porous wall or membrane.…”

Section: Introductionmentioning

confidence: 99%

Effects of non-Newtonian power law rheology on mass transport of a neutral solute for electro-osmotic flow in a porous microtube

Mondal

2013

Biomicrofluidics

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Mass transport of a neutral solute for a power law fluid in a porous microtube under electro-osmotic flow regime is characterized in this study. Combined electroosmotic and pressure driven flow is conducted herein. An analytical solution of concentration profile within mass transfer boundary layer is derived from the first principle. The solute transport through the porous wall is also coupled with the electro-osmotic flow to predict the solute concentration in the permeate stream. The effects of non-Newtonian rheology and the operating conditions on the permeation rate and permeate solute concentration are analyzed in detail. Both cases of assisting (electro-osmotic and poiseulle flow are in same direction) and opposing flow (the individual flows are in opposite direction) cases are taken care of. Enhancement of Sherwood due to electro-osmotic flow for a non-porous conduit is also quantified. Effects if non-Newtonian rheology on Sherwood number enhancement are observed. V C 2013 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

Effects of non-Newtonian power law rheology on mass transport of a neutral solute for electro-osmotic flow in a porous microtube

Mondal

2013

Biomicrofluidics

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“…This behavior is called electro osmotic drag. 3,4) we estimated mobility of water dragged by H + from time dependence of the peak position. The relationship between mobility and applied electric field E is written by <v> = qE, where <v> is an averaged velocity and q is a charge of the particle.…”

Section: Msme Pulse Sequencementioning

confidence: 99%

Observation of Electrophoretic Nuclear Magnetic Resonance Imaging in Polymer Electrolyte

Iwai

Kawamura

2010

J. Phys. Soc. Jpn.

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We studied proton dynamics in polymer electrolyte by nuclear magnetic resonance imaging (NMR imaging or MRI) combined with D.C. electric field. Two pulse sequences: Spin-Echo and RARE (rapid acquisition with relaxation enhancement techniques) methods are used to obtain the spin density distribution in the membrane and fine time resolution images. Migration process of water from anode to cathode was observed by NMR imaging while applying d.c. electric field. The diffusion coefficient evaluated from proton mobility measured by NMR imaging and self-diffusion coefficient measured by pulse-field gradient method has almost same order of magnitude. The intensity enhancement in the vicinity of Pt electrode was detected when d.c. polarity was inverted. It implies attracted protons (H + ) on Pt electrode react with dissolved oxygen gases to generate water.

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“…There are also some models that try to predict the electro-osmotic coefficient or use the electro-osmotic flux to determine membrane properties and structural aspects [4,[178][179][180][181].…”

Section: Transport Propertiesmentioning

confidence: 99%