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@ARTICLE{Mebrathu:894028,
      author       = {Mebrathu, C. and Nohl, Markus and Dittrich, Lucy and Foit,
                      Severin and de Haart, L. G. J. and Eichel, Rüdiger-A. and
                      Palkovits, Regina},
      title        = {{I}ntegrated {C}o-electrolysis and {S}yngas {M}ethanation
                      for the {D}irect {P}roduction of {S}ynthetic {N}atural {G}as
                      from {CO}2 and {H}2{O}},
      journal      = {ChemSusChem},
      volume       = {14},
      number       = {11},
      issn         = {1864-5631},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2021-02994},
      pages        = {2295 - 2302},
      year         = {2021},
      abstract     = {The concept of an integrated power-to-gas (P2G) process was
                      demonstrated for renewable energy storage by converting
                      renewable electrical energy to synthetic fuels. Such a
                      dynamically integrated process enables direct production of
                      synthetic natural gas (SNG) from CO2 and H2O. The produced
                      SNG can be stored or directly injected into the existing
                      natural gas network. To study process integration, operating
                      parameters of the high-temperature solid oxide electrolysis
                      cell (SOEC) producing syngas (H2+CO) mixtures through
                      co-electrolysis and a fixed bed reactor for syngas
                      methanation of such gas mixtures were first optimized
                      individually. Reactor design, operating conditions, and
                      enhanced SNG selectivity were the main targets of the study.
                      SOEC experiments were performed on state-of-the-art button
                      cells. Varying operating conditions (temperature, flow rate,
                      gas mixture and current density) emphasized the capability
                      of the system to produce tailor-made syngas mixtures for
                      downstream methanation. Catalytic syngas methanation was
                      performed using hydrotalcite-derived
                      $20 \%Ni-2 \%Fe/(Mg,Al)Ox$ catalyst and commercial
                      methanation catalyst (Ni/Al2O3) as reference. Despite water
                      in the feed mixture, SNG with high selectivity
                      $(≥90 \%)$ was produced at 300 °C and atmospheric
                      pressure. An adequate rate of syngas conversion was obtained
                      with H2O contents up to $30 \%,$ decreasing significantly
                      for $50 \%$ H2O in the feed. Compared to the commercial
                      catalyst, $20 \%Ni-2 \%Fe/(Mg,Al)Ox$ enabled a higher
                      rate of COx conversion.},
      cin          = {IEK-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-1232 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33901333},
      UT           = {WOS:000648034800001},
      doi          = {10.1002/cssc.202002904},
      url          = {https://juser.fz-juelich.de/record/894028},
}