Abstract
In this paper, a precipitated iron Fischer–Tropsch catalyst was prepared, which is similar to commercial CNFT-1 catalyst. The performance of as-prepared catalyst was tested for long time reaction of more than 1500 h. The results showed that gradual deactivation of catalyst was observed during the whole reaction period but with different deactivation rates. The activity of the catalyst decreased quickly during the first 500 h and was relatively stable after long time reaction. Catalysts sampled after reduction and different reaction times of 500, 1000 and 1500 h were characterized. As the catalyst was deactivated, α-Fe disappeared but resulted in increasing content of active Fe3C and Fe5C2 species and decreasing content of Fe3O4 for CO2 formation, which indicated the loss of active phase may not be the main influencing factor for the deactivation of precipitated iron catalyst. Sintering of crystallites and graphitic carbon deposition were observed on the samples after long time reaction, which might be responsible for the deactivation of precipitated iron catalyst during long-time reaction.
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Acknowledgements
This work was supported by the National Key Research Programs (2017YFB0602500 and 2018YFE0118200) and Key Research and Development Plan of Shandong Province (2019GSF109109).
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ZL, YL and ZY contributed to the study conception and design. Material preparation, data collection and analysis were performed by HL, WL and ZM. The first draft of the manuscript was written by WL and ZL and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. The work was supervised by ZM and ZY.
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Li, H., Liu, Z., Li, W. et al. Deactivation behavior investigation on commercial precipitated iron Fischer–Tropsch catalyst for long time reaction. J Porous Mater 29, 307–315 (2022). https://doi.org/10.1007/s10934-021-01174-1
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DOI: https://doi.org/10.1007/s10934-021-01174-1