% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Jerome:1049754,
      author       = {Jerome, Gbenga and Dam, An Phuc and Dirkes, Steffen and
                      Selmert, Victor and Samsun, Remzi Can and Eichel,
                      Rüdiger-A.},
      title        = {{D}ry{H}y: {P}rocess analysis and optimization of high
                      temperature solid oxide co-electrolysis coupled with direct
                      air capture for sustainable air-derived methanol},
      reportid     = {FZJ-2025-05538},
      year         = {2025},
      abstract     = {Addressing the increasing CO2 emissions contributing to
                      global climate change requires more than the transition to
                      the use of renewable electricity. As the chemical and
                      heavy-duty transport sectors remain dependent on
                      carbon-based inputs, alternative fossil-free production
                      pathways are essential. Green methanol produced from
                      renewable sources offers a promising pathway toward a
                      carbon-neutral economy. This approach not only facilitates
                      the storage of excess renewable power but also offers the
                      potential of recycling carbon dioxide. Sustainable
                      production of green methanol requires the availability of
                      renewable resources, negative CO2 feedstock and hydrogen
                      sources like water. However, the geographic mismatch between
                      renewable electricity potential and freshwater availability
                      poses a significant challenge for green methanol production.
                      Regions around the subtropics, which include most of Africa,
                      offer high solar potential but often face limited freshwater
                      availability. Therefore, it is crucial to produce green
                      methanol using processes that avoid competition with
                      freshwater resources. In the “DryHy” project, a process
                      technology is developed to overcome this challenge. By
                      combining direct air capture, which extracts water and
                      carbon dioxide from the atmosphere, with a Solid Oxide
                      Electrolysis (SOE) system powered by renewably generated
                      electricity, syngas can be produced as a key intermediate
                      for methanol synthesis. To assess the performance of this
                      process technology, a SOE system model capable of simulating
                      operation in co-electrolysis mode has been developed and
                      optimized in Aspen Plus. Two different system designs were
                      investigated, each utilizing different strategies of
                      avoiding undesired carbon deposition: a low utilization and
                      a high utilization design. Four key objectives were
                      considered in the multi-objective optimization study:
                      stoichiometric number, carbon oxide ratio, inlet
                      water-to-carbon dioxide ratio and energy efficiency related
                      to syngas composition and the SOE system design. The
                      trade-offs between these objectives are analyzed to optimize
                      the operation and performance of SOE systems in
                      co-electrolysis mode. A comparison of the two system designs
                      reveals that the high utilization design consistently
                      outperforms the low utilization design for the considered
                      objectives. In addition, a significant difference is
                      observed in the inlet water-to-carbon dioxide ratio required
                      to achieve the stoichiometric number needed for methanol
                      synthesis. Subsequently, the SOE system model will be
                      integrated with mathematical models of the direct air
                      capture system and the methanol reactor to assess the
                      performance and efficiency of the overall system. The
                      comprehensive analysis of the overall air-derived methanol
                      process will provide insight into important relationships
                      such as how variable product gas composition from the direct
                      air capture system affects SOE system performance and
                      subsequently methanol production. Moreover, insights will be
                      gained into how different system configurations and heat
                      integration strategies can further enhance the air-derived
                      methanol process.},
      month         = {Oct},
      date          = {2025-10-21},
      organization  = {International Conference on Circular
                       Economy, Renewable Energies and Green
                       Hydrogen in Africa, Windhoek (Namibia),
                       21 Oct 2025 - 25 Oct 2025},
      subtyp        = {After Call},
      cin          = {IET-1},
      cid          = {I:(DE-Juel1)IET-1-20110218},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123) /
                      BMBF-03SF0716A - Verbundvorhaben DryHy: Wasserbewusste
                      Erzeugung von Wasserstoff und e-Fuels in trockenen Regionen
                      (Phase 1), Teilvorhaben: Vorbereitung der Demonstationsphase
                      durch Untersuchung und Entwicklung der Einzeltechnologien
                      (BMBF-03SF0716) / HITEC - Helmholtz Interdisciplinary
                      Doctoral Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-1232 / G:(DE-Juel1)BMBF-03SF0716 /
                      G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1049754},
}