Study of activated carbon supported iron catalysts for the Fischer-Tropsch synthesis |
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| Authors: | Wenping Ma Yunjie Ding Jing Yang Xing Liu and Liwu Lin |
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| Institution: | (1) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China;(2) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China;(3) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China;(4) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China;(5) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China |
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| Abstract: | Summary Characterization (BET and TPD) and reaction studies were conducted with activated carbon supported iron catalysts (Fe/AC) used for the Fischer-Tropsch synthesis (FTS). The TPD study showed that there existed interactions between metals and the AC surface. Greater association of Cu and K promoters with the AC surface resulted in stronger promoter to surface interaction, which enhanced the H2 desorption ability of the Cu and K promoted Fe/AC catalyst prepared under vacuum impregnation (VI). Catalytic behavior of a Fe/AC catalyst (VI-15 Fe/2 Cu/2 K/81 AC, in parts per weight) was studied in a 1-liter slurry phase continuous stirred tank reactor. The catalyst presented moderate syngas conversion (44.3-60.6%) and high gaseous selectivity (CH4, 12.8-15.1% and C2-C4, 42.4-46.1%) under 304oC, 3.0 MPa, 1.1 L(STP)/g-cat/h, and H2/CO = 2.0 during 166 h of testing. Detectable hydrocarbons up to C18 were formed on the Fe/AC catalyst. |
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| Keywords: | Fischer-Tropsch synthesis Fe/AC catalyst continuous stirred tank reactor C1-C18 hydrocarbons |
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