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@ARTICLE{Hffelin:171695,
      author       = {Häffelin, A. and Niedrig, C. and Wagner, S. F. and
                      Baumann, Stefan and Meulenberg, Wilhelm Albert and
                      Ivers-Tiffée, E.},
      title        = {{T}hree-{D}imensional {P}erformance {M}odel for {O}xygen
                      {T}ransport {M}embranes},
      journal      = {Journal of the Electrochemical Society},
      volume       = {161},
      number       = {14},
      issn         = {0013-4651},
      address      = {Pennington, NJ},
      publisher    = {Electrochemical Soc.},
      reportid     = {FZJ-2014-05265},
      pages        = {F1409-F1415},
      year         = {2014},
      abstract     = {A three-dimensional finite element method (FEM) model that
                      enables the performance simulation of mixed ionic-electronic
                      conducting (MIEC) oxygen transport membranes (OTM) has been
                      developed. In order to evaluate the influence of a porous
                      functional layer on the membrane performance a numerical
                      geometry generator was implemented that allows to create
                      arbitrary porous microstructures. The 3D OTM model includes
                      the spatially coupled physicochemical processes i) gas
                      diffusion in the porous functional layer, ii) oxygen
                      exchange at the feed-side between gas phase and MIEC
                      material, iii) oxygen ion diffusion across the membrane, iv)
                      oxygen excorporation at the permeate-side. The performed
                      simulation carried out for the state-of-the-art MIEC
                      composition La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) was validated
                      with the help of oxygen permeation measurements carried out
                      on an asymmetric LSCF thin-film OTM in the temperature range
                      of 750…1000°C. The simulation results identified a
                      surface exchange dominated regime for membrane thicknesses
                      below 50 μm. While the application of a porous functional
                      layer on the feed side could only increase the permeation
                      flux by around $26\%,$ the model demonstrates the
                      significant improvement by a factor of two (for the given
                      conditions) that can be achieved with a functional layer on
                      the permeate side in case of a 20 μm thin-film membrane.},
      cin          = {IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {122 - Power Plants (POF2-122)},
      pid          = {G:(DE-HGF)POF2-122},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000345975500092},
      doi          = {10.1149/2.0601414jes},
      url          = {https://juser.fz-juelich.de/record/171695},
}