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@PHDTHESIS{Deischter:849343,
      author       = {Deischter, Jeff Gaston Jean},
      othercontributors = {Palkovits, Regina and Rose, Marcus Sören},
      title        = {{G}ewinnung von biomassebasierten {V}erbindungen durch
                      {A}dsorption an {A}ktivkohlen, {Z}eolithen und porösen
                      {P}olymeren},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2022-06740},
      pages        = {1 Online-Ressource : Illustrationen, Diagramme},
      year         = {2022},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Dissertation, RWTH Aachen University, 2022},
      abstract     = {In this dissertation, the recovery of biobased products
                      from aqueous phase by adsorption on commercial as well as
                      tailored adsorbents was investigated. The understanding of
                      structure-adsorption relationships could be extended by
                      detailed studies of the adsorption of the products L-lysine,
                      itaconic acid and D-glucose on activated carbons, covalent
                      triazine-based frameworks (CTFs) and zeolites. This allows
                      an establishment of adsorption-based separation processes
                      for future biorefineries. In the first part of the work, a
                      detailed insight into the liquid phase adsorption of
                      L-lysine on activated carbons and its separation from
                      D-glucose was given. Detailed characterization allowed the
                      implementation of structure-adsorption relationships. By
                      testing a variety of different commercial activated carbons,
                      it was demonstrated that a large specific surface area in
                      combination with a large amount of surface oxygen
                      functionalities is required to achieve high L-lysine
                      adsorption capacities of up to 256 mg g-1. A high amount of
                      oxygen functionalities resulted in improved separation of
                      L-lysine from lysine-glucose mixtures. The adsorption of
                      L-lysine in a continuous fixed bed adsorber, a setup
                      essential for an industrial application, was evaluated. In
                      addition, up to 95 $\%$ of the adsorbed L-lysine could be
                      desorbed by a suitable desorption strategy using water,
                      ethanol or sulfuric acid. In the next chapter, CTFs, a
                      material class that can be prepared via a variety of
                      nitrile-based monomers, were investigated for itaconic acid,
                      L-lysine and D-glucose adsorption applications. A number of
                      different monomers were used to synthesize CTFs using ZnCl2
                      as solvent and catalyst. For itaconic acid/glucose mixtures,
                      hydrophobic materials with a high C/N ratio showed the best
                      adsorption performance, with itaconic acid capacities up to
                      400 mg g-1 and high separation efficiencies. For the
                      lysine-glucose mixtures, high hydrophilicity proved to be
                      beneficial to facilitate L-lysine separation. Overall, CTFs
                      appear to combine the best of both worlds - polymer and
                      carbonaceous material - and can serve as model systems for
                      understanding N-based carbonaceous feedstocks. In the third
                      chapter of this thesis, the selective adsorption of L-lysine
                      from lysine-glucose mixtures was evaluated on various
                      zeolites with different structural properties and Si/Al
                      ratios. Zeolites can act as a molecular sieve and thus
                      selectively adsorb or exclude compounds with specific
                      molecular sizes. In the competitive adsorption of L-lysine
                      and D-glucose, the effect of zeolites as a molecular sieve
                      was highlighted. High separation factors could be achieved,
                      due to the fact that D-glucose cannot enter the pore system
                      of the zeolites because of its molecular size. In the last
                      part of the work, the adsorption process was coupled with a
                      bio-technological itaconic acid production process to
                      investigate its suitability for in situ product re-covery.
                      The in situ separation of itaconic acid prevented product
                      inhibition, resulting in an in-crease of 11 $\%$ in the
                      space-time yield of the bioprocess. In combination with
                      highly selective product recovery, a promising downstream
                      technology for future biorefinery processes can be
                      achieved.},
      cin          = {155310 / 150000},
      ddc          = {540},
      cid          = {$I:(DE-82)155310_20140620$ / $I:(DE-82)150000_20140620$},
      pnm          = {TIB: BioSorp : Teilprojekt A; Das Potential von Adsorption
                      zur energieeffizienten Stofftrennung in fermentativen
                      Bioraffinerie-Prozessen (BMBF-031B0678A)},
      pid          = {G:(DE-82)BMBF-031B0678A},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2022-06740},
      url          = {https://publications.rwth-aachen.de/record/849343},
}