Synthesis of stable and low-CO 2 selective ε-iron carbide Fischer-Tropsch catalysts
The Fe-catalyzed Fischer-Tropsch (FT) reaction constitutes the core of the coal-to-liquids (CTL) process, which converts coal into liquid fuels. Conventional Fe-based catalysts typically convert 30% of the CO feed to CO in the FT unit. Decreasing the CO release in the FT step will reduce costs and e...
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Published in | Science advances Vol. 4; no. 10; p. eaau2947 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
05.10.2018
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Online Access | Get full text |
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Summary: | The Fe-catalyzed Fischer-Tropsch (FT) reaction constitutes the core of the coal-to-liquids (CTL) process, which converts coal into liquid fuels. Conventional Fe-based catalysts typically convert 30% of the CO feed to CO
in the FT unit. Decreasing the CO
release in the FT step will reduce costs and enhance productivity of the overall process. In this context, we synthesize phase-pure ε(')-Fe
C catalysts exhibiting low CO
selectivity by carefully controlling the pretreatment and carburization conditions. Kinetic data reveal that liquid fuels can be obtained free from primary CO
. These catalysts displayed stable FT performance at 23 bar and 235°C for at least 150 hours. Notably, in situ characterization emphasizes the high durability of pure ε(')-Fe
C in an industrial pilot test. These findings contribute to the development of new Fe-based FT catalysts for next-generation CTL processes. |
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ISSN: | 2375-2548 2375-2548 |
DOI: | 10.1126/sciadv.aau2947 |