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@BOOK{Wenzel:128366,
      author       = {Wenzel, David},
      title        = {{K}eramiken und {K}eramikkombinationen zur
                      {F}einstpartikelabscheidung mit {H}ilfe thermischinduzierter
                      {P}otentialfelder und {E}lektronenemissionen},
      volume       = {152},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2013-00105},
      isbn         = {978-3-89336-820-4},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {155 pp.},
      year         = {2012},
      note         = {Schriften des Forschungszentrums Jülich; RWTH Aachen,
                      Diss., 2012},
      abstract     = {Fine particle removal is an important step in coal or
                      biomass gasification and in advanced coal fired power plants
                      using PPCC-, IGCC- or oxycoal technology. Decreasing
                      pressure or temperature of the flue gas, as is necessary for
                      conventional ceramic candle filters, decreases the
                      thermodynamic efficiency and should therefore be avoided. In
                      this dissertation, which traces back to the AiF-project 275
                      Z, the electrochemical properties of several ceramic
                      materials and ceramic material combinations were
                      investigated. Based on those prior works aluminum oxide,
                      cerium oxide, chromium oxide, magnesium oxide, and zirconium
                      oxide were chosen for further investigation. Additional
                      measurements were performed on titanium dioxide, silicon
                      carbide and the chromium aluminum oxide/zirconium oxide
                      ceramic SEPR. Conductivity and charge carriers were
                      determined for temperatures between 800 °C and 1500 °C by
                      impedance spectroscopy measurements. The strength of the
                      electrostatic potentials between the ceramic materials were
                      also measured in this temperature range. The electron work
                      functions of the ceramics were determined by measuring the
                      conductivity between two electrodes, which was influenced by
                      the number of thermally emitted electrons. Ceramic samples
                      were used in an experiment conducted together with the
                      Karlsruhe Institute of Technology (KIT). In this experiment
                      titanium dioxide particles in a hot aerosol were thermally
                      charged, using those ceramic samples, and finally removed
                      using electrical fields. The electrical charge of the
                      particles and the efficiency of their removal were probed in
                      this experiment for temperatures between 900 °C and 1300
                      °C. The thermal emission of electrons from the ceramic
                      samples was also influenced by additional electric fields.
                      Using either silicon carbide or a ceramic combination of
                      aluminum oxide and zirconium oxide showed the best results.
                      Ceramics including chromium oxide might therefore not be
                      necessary for future applications of the thermionic
                      electrical filter, which was developed together with the KIT
                      and the Institute of Energy and Environmental Technology
                      e.V. (IUTA), so that problematic chromium(VI) emissions
                      would be avoidable.},
      cin          = {IEK-2},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {112 - Concentrating Solar Systems (POF2-112)},
      pid          = {G:(DE-HGF)POF2-112},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/128366},
}