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Electrical Reverse Shift: Sustainable CO2 Valorization for Industrial Scale.

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Sustainable chemical production requires CO2 utilization. Electrified reverse water-gas-shift (eRWGS™) efficiently converts CO2 and H2 into synthesis gas using a nickel catalyst at high temperatures, enabling cleaner fuel production.

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Area of Science:

  • Chemical Engineering
  • Catalysis
  • Sustainable Chemistry

Background:

  • CO2 utilization is crucial for sustainable chemical production.
  • The reverse water-gas-shift (RWGS) reaction converts CO2 and H2 into synthesis gas.
  • Existing industrial infrastructure can utilize synthesis gas.

Purpose of the Study:

  • To achieve fully electrified reverse water-gas-shift (eRWGS™) at industrially relevant conditions.
  • To valorize CO2 into synthesis gas suitable for sustainable fuel production.
  • To evaluate the efficiency and selectivity of the eRWGS™ process.

Main Methods:

  • Integrated ohmic heating with a nickel-type catalyst.
  • Operating at 10 barg and 1050°C with a H2:CO2 feed ratio of 2.25.
  • Investigating the CH4 intermediate pathway versus selective RWGS.

Main Results:

  • Production of synthesis gas with a H2/CO ratio of 2.0.
  • No detectable methane formation observed.
  • The CH4 intermediate pathway showed higher activity and suppressed carbon formation compared to selective RWGS.

Conclusions:

  • The eRWGS™ process provides an emissions-free route for synthesis gas production.
  • This method enables sustainable production of carbon-based chemicals from CO2 and renewable electricity.
  • High hydrogen and carbon efficiency were achieved, ideal for Fischer-Tropsch synthesis and other applications.