Two-phase flow in a proton exchange membrane electrolyzer visualized in situ by simultaneous neutron radiography and optical imaging

dc.contributor.authorSelamet, O. F.
dc.contributor.authorPasaogullari, U.
dc.contributor.authorSpernjak, D.
dc.contributor.authorHussey, D. S.
dc.contributor.authorJacobson, D. L.
dc.contributor.authorMat, M. D.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2013
dc.departmentNiğde ÖHÜ
dc.description.abstractIn proton exchange membrane (PEM) electrolyzers, oxygen evolution in the anode and flooding due to water cross-over in the cathode yields two distinct two-phase transport conditions which strongly affect the performance. Two-phase transport in an electrolyzer cell is visualized by simultaneous neutron radiography and optical imaging. Optical and neutron data are used in a complementary manner to aid in understanding the two-phase flow behavior. Two different patterns of gas-bubble evolution and departure are identified: periodic growth/removal of small bubbles vs. prolonged blockage by stagnant large bubbles. In addition, the bubble distribution across the active area is not uniform due to combined effects of buoyancy and proximity to the inlet. The effects of operating parameters such as current density, temperature and water flow rate on the two-phase distribution are investigated. Higher water accumulation is detected in the cathode chamber at higher current density, even though the cathode is purged with a high flow rate of N-2. The temperature is found to affect the volume of water; higher temperature yields less water and more gas volume in the anode chamber. Higher temperature also enhanced the water transport in the cathode chamber. Finally, water transported through the membrane to the cathode reduced the cell performance by limiting the hydrogen mass transport. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
dc.description.sponsorshipScientific and Research Council of Turkey (TUBITAK); National Science Foundation [CBET-0748063]; U.S. Department of Commerce; NIST Radiation and Biomolecular Physics Division; Director's Office of NIST; NIST Center for Neutron Research; Department of Energy [DEAI01-01EE50660]
dc.description.sponsorshipOmer F. Selamet would like to thank the Scientific and Research Council of Turkey (TUBITAK) for financial support for this research. Financial support for this work from the National Science Foundation (CBET-0748063) is gratefully acknowledged. This work was supported by the U.S. Department of Commerce, the NIST Radiation and Biomolecular Physics Division, the Director's Office of NIST, the NIST Center for Neutron Research, and the Department of Energy through Interagency Agreement No. DEAI01-01EE50660. We thank professors Ajay K. Prasad and Suresh G. Advani of the University of Delaware for their assistance with the experimental setup and equipment loan, Eli Baltic of the NIST for his help during the experiments in the NIST, and Richard S. Fu for his help with data analysis.
dc.identifier.doi10.1016/j.ijhydene.2013.02.087
dc.identifier.endpage5835
dc.identifier.issn0360-3199
dc.identifier.issue14
dc.identifier.scopus2-s2.0-84876723304
dc.identifier.scopusqualityQ1
dc.identifier.startpage5823
dc.identifier.urihttps://dx.doi.org/10.1016/j.ijhydene.2013.02.087
dc.identifier.urihttps://hdl.handle.net/11480/4401
dc.identifier.volume38
dc.identifier.wosWOS:000319232500036
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectProton exchange membrane electrolyzer
dc.subjectTwo-phase flow
dc.subjectNeutron radiography
dc.subjectOptical imaging
dc.subjectHydrogen production
dc.titleTwo-phase flow in a proton exchange membrane electrolyzer visualized in situ by simultaneous neutron radiography and optical imaging
dc.typeArticle

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