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Catalytic Hydrogenation of CO 2 to Methanol over Cu/MgO Catalysts in a Semi-Continuous Reactor

Author

Listed:
  • Sascha Kleiber

    (Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, NAWI Graz, Inffeldgasse 25C, 8010 Graz, Austria)

  • Moritz Pallua

    (Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, NAWI Graz, Inffeldgasse 25C, 8010 Graz, Austria)

  • Matthäus Siebenhofer

    (Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, NAWI Graz, Inffeldgasse 25C, 8010 Graz, Austria)

  • Susanne Lux

    (Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, NAWI Graz, Inffeldgasse 25C, 8010 Graz, Austria)

Abstract

Methanol synthesis from carbon dioxide (CO 2 ) may contribute to carbon capture and utilization, energy fluctuation control and the availability of CO 2 -neutral fuels. However, methanol synthesis is challenging due to the stringent thermodynamics. Several catalysts mainly based on the carrier material Al 2 O 3 have been investigated. Few results on MgO as carrier material have been published. The focus of this study is the carrier material MgO. The caustic properties of MgO depend on the caustification/sintering temperature. This paper presents the first results of the activity of a Cu/MgO catalyst for the low calcining temperature of 823 K. For the chosen calcining conditions, MgO is highly active with respect to its CO 2 adsorption capacity. The Cu/MgO catalyst showed good catalytic activity in CO 2 hydrogenation with a high selectivity for methanol. In repeated cycles of reactant consumption and product condensation followed by reactant re-dosing, an overall relative conversion of CO 2 of 76% and an overall selectivity for methanol of 59% was obtained. The maximum selectivity for methanol in a single cycle was 88%.

Suggested Citation

  • Sascha Kleiber & Moritz Pallua & Matthäus Siebenhofer & Susanne Lux, 2021. "Catalytic Hydrogenation of CO 2 to Methanol over Cu/MgO Catalysts in a Semi-Continuous Reactor," Energies, MDPI, vol. 14(14), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4319-:d:596335
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    References listed on IDEAS

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    2. Dasireddy, Venkata D.B.C. & Likozar, Blaž, 2019. "The role of copper oxidation state in Cu/ZnO/Al2O3 catalysts in CO2 hydrogenation and methanol productivity," Renewable Energy, Elsevier, vol. 140(C), pages 452-460.
    3. Razali, Nurul Aini Mohamed & Lee, Keat Teong & Bhatia, Subhash & Mohamed, Abdul Rahman, 2012. "Heterogeneous catalysts for production of chemicals using carbon dioxide as raw material: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 4951-4964.
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