Cited by 7Catalysts for Methane ReformingCO2 Reduction Techniques and CatalystsCarbon dioxide utilization in catalysis

Two-Step Conversion of CO2 to Light Olefins: Laboratory-Scale Demonstration and Scale-Up Considerations

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Reinikainen, Matti, Braunschweiler, Aki, Korpilo, Sampsa, Simell, Pekka, Alopaeus, Ville·2022·ChemEngineering

Abstract

The highly selective production of light olefins from CO2 was demonstrated for the first time with a laboratory-scale process comprising consecutive reverse water gas shift (RWGS) and Fischer–Tropsch (FT) reactors. The RWGS reaction, catalyzed by rhodium washcoated catalyst at 850 °C yielded good quality syngas with conversion values close to the thermodynamic equilibrium and without experiencing catalyst deactivation from carbon formation or sintering. For the FT synthesis, a packed bed Fe-Na-S/α-Al2O3 catalyst was used. The highest light olefin selectivity observed for the FT-synthesis was 52% at 310 °C, GHSV of 2250 h−1 and H2/CO ratio of 1. However, the optimal conditions for the light olefin production were determined to be at 340 °C, a GHSV of 3400 h−1 and a H2/CO ratio of 2, as the CO conversion was markedly higher, while the light olefin selectivity remained at a suitably high level. In addition to the experimental results, considerations for the further optimization and development of the system are presented. The combined RWGS–FT process seems to work reasonably well, and initial data for basic process design and modeling were produced.

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  • Conversion of CO2 to liquid fuels can occur via one-step (direct CO2 hydrogenation) or two-step processes; the latter typically involve an intermediate reverse water-gas shift to produce CO, which is then hydrogenated in a subsequent step like Fischer-Tropsch synthesis.

    “The conversion of CO 2 to liquid fuels can occur via one-step (direct CO 2 hydrogenation) or two-step processes [286,287]; the latter typically involve an intermediate reaction such as the reverse water-gas shift (RWGS) expressed by Equation (4) to produce CO, which is then hydrogenated in a subsequent step like F-T synthesis [288,289].”

    From Biofuels, E-Fuels, and Waste-Derived Fuels: Advances, Challenges, and Future Directions (2025) · cites this paper as [289]

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  • A critical factor for the efficiency of Fischer-Tropsch synthesis coupled with an RWGS reactor is the precise management of the H2/CO ratio in the syngas and effective process integration.

    “A critical factor for the efficiency of F-T synthesis coupled with an RWGS reactor is the precise management of the H 2 /CO ratio in the syngas and effective process integration [288,289].”

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Research works printed but not linked: 4

  1. Zimmermann, H. Light Olefins-Challenges from New Production Routes? In Opportunities and Challenges at the Interface between Petrochemistry and Refinery; U.S. Department of Energy: Washington, DC, USA, 2007; pp. 75-86.
  2. Klerk, A.D. Fischer-Tropsch Refining; Wiley-VCH Verlag GmbH & Co.: Weinheim, Germany, 2011.
  3. Maitlis, P.M.; de Klerk, A. Greener Fischer-Tropsch Processes; Wiley-VCH Verlag GmbH & Co.: Weinheim, Germany, 2012.
  4. Portillo, A.; Ateka, A.; Ereña, J.; Aguayo, A.T.; Bilbao, J. Conditions for the Joint Conversion of CO 2 and Syngas in the Direct Synthesis of Light Olefins Using In 2 O 3 -ZrO 2 /SAPO-34 Catalyst. Ind. Eng. Chem. Res. 2021, 61, 29. [CrossRef] [PubMed] · DOI

Cited by

Authors
Reinikainen, M., Braunschweiler, A., Korpilo, S., Simell, P., & Alopaeus, V.
Affiliations
  • VTT Technical Research Centre of Finland (FI)
  • Aalto University (FI)
Corresponding author
Reinikainen, Matti
Venue
ChemEngineering
Publisher
MDPI AG
Published
2022-12-06
Volume
6
Issue
6
Pages
96
ISSN
2305-7084 (ISSN-L)
OpenAlex
W4311808983
Cited by
7
References
55
Citations by year
2026: 2 · 2025: 4 · 2023: 1
FWCI
0.23
Type
journal article
Language
en
Open access
Locations
  • ChemEngineering (publishedVersion, cc-by)
  • Aaltodoc (Aalto University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Business Finland (3834/31/2019)
Topics
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Keywords
CO2 conversion, light olefins, reverse water-gas shift reaction, Fischer-Tropsch synthesis, syngas production, rhodium catalysts, two-stage process, scale-up, process design, process modeling, H2/CO ratio, catalyst deactivation

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