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An Na-modified Fe@C core-shell catalyst for the enhanced production of gasoline-range hydrocarbons Fischer-Tropsch synthesis.
RSC Adv
School of Power and Mechanical Engineering, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University Wuhan 430072 China
Published: March 2020
Although numerous studies have been conducted in the field of converting syngas to value-added fuels, selectively converting syngas to gasoline-range hydrocarbons (C hydrocarbons) remains a big challenge. Alkali metal (namely, K, Na and Li)-modified Fe@C core-shell catalysts were synthesized by a one-step hydrothermal method for Fischer-Tropsch synthesis. An optimized selectivity of 56% for the C hydrocarbons with a higher CO conversion of about 95% was obtained for the FeNa@C catalyst compared to that for other alkali metal-modified Fe@C catalysts. According to the characterization results, the incorporation of alkali metals into Fe@C enhanced the conversion of FeCO to FeO, which promoted the formation of the FTS active phase iron carbides. In particular, the strongest interaction of Fe-alkali metal and the highest amount of surface carbon layers were observed after adding an Na promoter into Fe@C in contrast to that observed for K and Li promoters, which strengthened the synergistic effect of Fe-Na metals and the spatial confinement of the core-shell structure, further improving the C hydrocarbon selectivity.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9050398 | PMC |
| http://dx.doi.org/10.1039/d0ra01036g | DOI Listing |
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