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@PHDTHESIS{Wolf:31394,
      author       = {Wolf, Karl Josef},
      title        = {{U}ntersuchungen zur {F}reisetzung und {E}inbindung von
                      {A}lkalimetallen bei der reduzierenden
                      {D}ruckwirbelschichtverbrennung},
      volume       = {4078},
      issn         = {0944-2952},
      school       = {Techn. Hochsch. Aachen},
      type         = {Dr. (FH)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-31394, Juel-4078},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {145 p},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012; Aachen, Techn.
                      Hochsch., Diss., 2003},
      abstract     = {Modern 2$^{nd}$ Generation Pressurized Fluidized Bed
                      Combustion (PFBC) Combined Cycle Power Systems are a
                      sufficient way to increase the efficiency of coal
                      combustion. However, Combined Cycle Power Systems require a
                      reliable hot gas cleanup. Especially alkali metals, such as
                      Sodium and Potassium, can lead to severe damage of the
                      gasturbine blading due to hot corrosion. The investigations
                      described in this thesis were performed to determine the
                      potential of alkali metal reduction from hot gases by
                      alumosilicate sorbents under reducing atmospheres at 750
                      °C. Using a flow channel reactor, an alkalichloride laden
                      gas stream was passed through a bed of alumosilicate
                      sorbent. Both, qualitative and quantitative analysis of the
                      hot gas downstream the sorbent bed was achieved using High
                      Pressure Mass Spectrometry (HPMS). Thus, the influence of
                      several different gas atmospheres on the alkalisorption
                      behavior could be observed and conclusions be drawn
                      concerning the chemical reactions occuring inside the
                      sorbent bed. Several annealing experiments were performed to
                      determine the maximum loading capacity of the sorbent,
                      subsequent REM and XRD analysis showed the phases formed
                      inside the tested sorbent materials. Finally, thermodynamic
                      calculations were done to upscale the results of the
                      laboratory experiments to conditions prevailing in 2$^{nd}$
                      Gen. PFBC systems. The investigations revealed the
                      possibility of reducing the overall alkaliconcentration in
                      the hot gas under 2$^{nd}$ Gen. PFBC conditions to values <
                      25 ppb$_{vol}$ by alumosilicate sorbents.},
      cin          = {IWV-2},
      cid          = {I:(DE-Juel1)VDB2},
      pnm          = {Werkstoffsysteme für Kraftwerke},
      pid          = {G:(DE-Juel1)FUEK248},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/31394},
}