Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified <italic style="font-style: italic">ε</italic>-Fe<sub>2</sub>C catalysts

QIAN Fei; WEI Zidu; ZHU Jiahuan; ZHANG Chao; XIANG Hongwei; LIU Xingwu

doi:10.12434/j.issn.2097-2547.20250116

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Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe₂C catalysts

更新时间：2025-08-11

- Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe₂C catalysts
- Pages: 1-10(2025)
- 作者机构：
  
  1.中国科学院山西煤炭化学研究所煤炭高效低碳利用全国重点实验室，山西太原 030001
  2.中国科学院大学，北京 100049
  3.中科合成油技术股份有限公司，北京 101407
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250116
  CLC： TQ426.6
- Received：18 March 2025，
  
  Revised：03 April 2025，
  
  Published Online：08 August 2025，
- 稿件说明：
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钱飞,魏子都,朱家欢等.Mn或K修饰ε-Fe₂C催化剂的制备及其费托合成性能研究[J].低碳化学与化工,

QIAN Fei,WEI Zidu,ZHU Jiahuan,et al.Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe₂C catalysts[J].Low-Carbon Chemistry and Chemical Engineering,
钱飞,魏子都,朱家欢等.Mn或K修饰ε-Fe₂C催化剂的制备及其费托合成性能研究[J].低碳化学与化工, DOI：10.12434/j.issn.2097-2547.20250116.

QIAN Fei,WEI Zidu,ZHU Jiahuan,et al.Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe₂C catalysts[J].Low-Carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20250116.

摘要

铁基催化剂在费托合成（Fischer-Tropsch Synthesis，FTS）反应中具有重要的作用，但其复杂的物相结构与较大的副产物选择性制约了其进一步发展，亟需建立单相铁基催化剂，探究反应流程，并结合助剂的作用增大目标产物选择性。通过普鲁士蓝类似物的热解，成功制备了高稳定性的

-Fe

C催化剂，并研究了Mn与K助剂对催化剂结构和催化性能的影响。结果表明，在270 °C、3 MPa、合成气

(CO) = 2:1和反应空速（GHSV）为30000 (mL)/(g·h)条件下以及Mn助剂修饰的

-Fe

C催化剂作用下反应25 h，CO

选择性减小至7.5%，K助剂修饰的

-Fe

C催化剂作用下，C

烃类产物选择性可达71.5%。两种助剂修饰的催化剂在反应前后均保持

-Fe

C结构，反应80 h中，催化剂活性和产物选择性均保持稳定，Mn助剂修饰的

-Fe

C催化剂副产物选择性较小，催化性能更优。通过XRD、TEM和XPS等表征手段，揭示了催化剂的微观结构变化及其对FTS催化性能的影响，发现助剂产生的尺寸效应使得催化剂作用下的CO转化率减小。Mn与K作为电子助剂给催化剂提供电子，保证了催化剂表面结构的稳定性，调控了产物分布。在单相

-Fe

C催化剂上引入助剂调控催化活性和产物分布，可为产物选择性较大的FTS催化剂开发提供新思路。

Abstract

Iron-based catalysts play a crucial role in Fischer-Tropsch Synthesis (FTS). However

their complex phase structures and high by-product selectivities limit further development. It is urgent to establish single-phase iron catalysts

explore the reaction processes and increase target product selectivities with promoters. Highly stable

-Fe

C catalysts were successfully prepared by pyrolysis of Prussian Blue Analogues

and the effects of Mn and K promoters on the catalyst structures and catalytic performances were investigated. The results show that under reaction conditions of 270 °C

3 MPa

(CO) = 2:

and gas hourly space velocity (GHSV) of 30000 mL/(g·h)

with the Mn-modified

-Fe

C catalyst

selectivity decreases to 7.5%

and with the K-modified

-Fe

C catalyst

hydrocarbon selectivity reaches 71.5% after 25-hour reaction. The catalysts modified by the two promoters maintain

-Fe

C structure before and after the reaction

and their activities and product selectivities remain stable during an 80-hour reaction. The Mn-modified

-Fe

C catalyst exhibits better catalytic performance due to low by-product selectivity. By characterization methods such as XRD

TEM

and XPS

the microstructural changes and their effects on FTS catalytic performances of the catalysts were revealed. It is found that the size effect produced by promoters results in a decrease in CO conversion rate with catalysts. Mn and K

as electronic promoters

provide electrons to the catalysts

ensuring the stability of the surface structures and regulating product distributions. The introduction of promoters into

-Fe

C catalysts can effectively regulate catalytic activities and product distributions

providing a novel strategy for the development of FTS catalysts with high product selectivities.

关键词

Keywords

references

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Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe2C catalysts

DOI：10.12434/j.issn.2097-2547.20250116

摘要

Abstract

关键词

Keywords

references

Study on preparation and Fischer-Tropsch synthesis performances of Mn or K modified ε-Fe₂C catalysts