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@PHDTHESIS{Brands:10730,
      author       = {Brands, Katharina},
      title        = {{E}ntwicklung und {C}harakterisierung eines metallischen
                      {S}ubstrats für eine nanostrukturierte, keramische
                      {G}astrennmembran},
      volume       = {72},
      issn         = {1866-1793},
      school       = {Ruhr-Universität Bochum},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zenralbibliothek,
                      Zentralbibliothek},
      reportid     = {PreJuSER-10730},
      isbn         = {978-3-89336-640-8},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VII, 137 p.},
      year         = {2010},
      note         = {Record converted from VDB: 12.11.2012; Ruhr-Universität
                      Bochum, Diss., 2010},
      abstract     = {In order to minimize the further increase of
                      CO$_{2}$-content in the atmosphere, efforts are made to
                      separate and store CO$_{2}$ from exhaust gases of fossil
                      power plants. Beside well-established separation techniques
                      like chemical scrubber, the application of membrane
                      technology is intensively investigated. One focus of this
                      thesis is the development of metal supported substrates for
                      microporous ceramic gas separation membranes, which are
                      expected to have a higher mechanical stability than ceramic
                      supported substrates. Starting with commercial porous steel
                      substrates, interlayers are applied by wet powder spraying.
                      For the interlayers the materials 1.4404-stainless steel and
                      TiO$_{2}$ or 1.4845-stainless steel and yttria stabilized
                      zirconia (8YSZ) are chosen. The interlayers have to be
                      defect-free, as minimal defects can deteriorate the membrane
                      performance. By a subsequent mechanical treatment and an
                      adjustment of the viscosity of the 8YSZ-suspension, the
                      surface quality is considerably increased. At the same time
                      the limits of the wet powder spraying process become
                      obvious, as sporadic agglomerates, which are formed during
                      the spraying process, cannot be totally avoided. The metal
                      supported substrates are characterized regarding to the
                      interaction between steel and ceramic, the roughness of the
                      layers compared to polished ceramic substrates, the
                      mechanical properties and the flow through the substrates.
                      Furthermore microporous ceramic gas separation membranes are
                      deposited on wet powder sprayed and dip coated substrates.
                      The selectivity of these membranes is above Knudsen
                      selectivity. The other focus of the thesis is the exposure
                      of substrates and membranes to real flue gas conditions.
                      Beside microporous ceramic membranes polymer membranes are
                      analysed as a reference, which show a higher state of
                      development compared to microporous ceramic membranes. For
                      this purpose a test bed is built up in the EnBW
                      “Rheinhafendampfkraftwerk RDK 7” after the flue gas
                      desulfurization plant. It is operated for a maximum time of
                      1600 h with polymer and microporous ceramic membranes. In
                      several iterations with longer periods of time the test bed
                      is optimized and automated so that long term measurements
                      with continuous data recording are possible. The results
                      show that the formation of a filter cake from gypsum and fly
                      ash on the gas separation membrane reduces the mass flow
                      through the membranes. The used steel alloys 1.4404 and
                      1.4845 show after exposure to flue gas for more than 1000 h
                      first signs of corrosion. In the case of polymer membranes
                      an enrichment of the CO$_{2}$ content in the permeate to the
                      range of 40Vol.-\% to 57Vol.-\% can be demonstrated. After
                      more than 1000 h exposure the polymer membranes showed
                      irreversible defects, which inhibit gas separation. The
                      results of the thesis are important basis for the further
                      development of gas separation membranes for CO$_{2}$
                      separation from fossil-fired power plants, as for the first
                      time the boundary conditions for membranes in the flue gas
                      are characterized. Furthermore first hints regarding the
                      stability of the used membrane materials in the flue gas are
                      given, which will contribute to follow-up activities.},
      cin          = {IEF-1},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)VDB809},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/10730},
}