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@BOOK{Stemmler:136273,
      author       = {Stemmler, Michael},
      title        = {{C}hemische {H}eißgasreinigung bei
                      {B}iomassegasungsprozessen},
      volume       = {90},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-136273},
      isbn         = {978-3-89336-678-1},
      series       = {Schriften des Forschungszentrums Jülich. Reihe Energie und
                      Umwelt / Energy und Environment},
      pages        = {XV, 196 S.},
      year         = {2010},
      note         = {Record converted from JUWEL: 18.07.2013; RWTH Aachen,
                      Diss., 2010},
      abstract     = {The German goverment decided to increase the percentage of
                      renewable energy up to 20 $\%$ of all energy consumed in
                      2020. The development of biomass gasification technology is
                      advanced compared to most of the other technologies for
                      producing renewable energy. So the overall efficiency of
                      biomass gasification processes (IGCC) already increased to
                      values above 50 $\%.$ Therefore, the production of renewable
                      energy attaches great importance to the thermochemical
                      biomass conversion. The feedstock for biomass gasification
                      covers biomasses such as wood, straw and further energy
                      plants. The detrimental trace elements released during
                      gasification of these biomasses, e.g. KCl, H$_{2}$S and HCl,
                      cause corrosion and harm downstream devices. Therefore, gas
                      cleaning poses an especial challenge. In order to improve
                      the overall efficiency this thesis aims at the development
                      of gas cleaning concepts for the allothermic, water blown
                      gasification at 800 °C and 1 bar (Güssing-Process) as well
                      as for the autothermic, water and oxygen blown gasification
                      at 950 °C and 18 bar (Värnamo-Process). Although several
                      mechanisms for KCl- and H$_{2}$S-sorption are already well
                      known, the achievable reduction of the contamination
                      concentration is still unknown. Therefore, calculations on
                      the produced syngas and the chemical hot gas cleaning were
                      done with a thermodynamic process model using SimuSage. The
                      syngas production was included in the calculations because
                      the knowledge of the biomass syngas composition is very
                      limited. The results of these calculations prove the
                      dependence of syngas composition on H$_{2}$/C-ratio and
                      $\textit{ROC (Relative Oxygen Content)}$. Following the
                      achievable sorption limits were detected via experiments.
                      The KCl containing syngases were analysed by molecular beam
                      mass spectrometry (MBMS). Furthermore, an optimised
                      H$_{2}$S-sorbent was developed because the examined sorbents
                      exceeded the sorption limit of 1 ppmv. The calculated
                      sorption limits were compared to the limits achievable in
                      experiments. Finally, the hot gas cleaning concepts for both
                      processes were developed on the basis of these results.},
      cin          = {IEK-2},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/136273},
}