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<p>Fischer Tropsch synthesis provides a non-petroleum pathway for the production of high value liquid fuels and long-chain alpha olefins from syngas. However, regulating product distribution to promote the formation of high value product while maintaining low selectivity for C1 by-products (CH<sub>4</sub> and CO<sub>2</sub>) remains a significant challenge. Iron based composite catalysts were prepared via dual doping and modification, i.e., alkali metals and transition metals using mesoporous silica SBA-15 as the support. The catalyst was characterized by XPS, XRD, H<sub>2</sub>-TPR, CO<sub>2</sub>-TPD, TEM, Roman and other methods, and the relationship between the catalyst structure and catalytic performance was studied. At 1&#xa0;MPa and 300&#xa0;°C, The CO conversion rate of Fe–Zn–K/SBA-15 (30% −&#xa0;10% 2%/100%) catalyst is 62.4%, methane selectivity is reduced to 4.6%, carbon dioxide selectivity is 32.6%, olefin ratio is 7.6%, and long-chain hydrocarbon C<sub>5</sub> + selectivity is 62.8%.</p>

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Study on iron based Fischer–Tropsch synthesis catalyst supported on mesoporous silica promoted by alkali and transition metals

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月23日

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  • Jun Wang,
  • Zewan Bao,
  • Peng Wang,
  • Peiliang Feng,
  • Quan Wang,
  • Xuemei Shen,
  • Luya Zhang,
  • Yishuang Wang,
  • Mingqiang Chen

摘要

Fischer Tropsch synthesis provides a non-petroleum pathway for the production of high value liquid fuels and long-chain alpha olefins from syngas. However, regulating product distribution to promote the formation of high value product while maintaining low selectivity for C1 by-products (CH4 and CO2) remains a significant challenge. Iron based composite catalysts were prepared via dual doping and modification, i.e., alkali metals and transition metals using mesoporous silica SBA-15 as the support. The catalyst was characterized by XPS, XRD, H2-TPR, CO2-TPD, TEM, Roman and other methods, and the relationship between the catalyst structure and catalytic performance was studied. At 1 MPa and 300 °C, The CO conversion rate of Fe–Zn–K/SBA-15 (30% − 10% 2%/100%) catalyst is 62.4%, methane selectivity is reduced to 4.6%, carbon dioxide selectivity is 32.6%, olefin ratio is 7.6%, and long-chain hydrocarbon C5 + selectivity is 62.8%.