Effects of N contents on catalytic performances of iron nitride catalysts for CO<sub>2</sub> hydrogenation to low-carbon olefins

SUN Haochun; LIAO Bingbing; DANG Shanshan; TU Weifeng; ZHANG Zhenzhou

doi:10.12434/j.issn.2097-2547.20250194

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Effects of N contents on catalytic performances of iron nitride catalysts for CO₂ hydrogenation to low-carbon olefins

更新时间：2026-04-23

- Effects of N contents on catalytic performances of iron nitride catalysts for CO₂ hydrogenation to low-carbon olefins
- Vol. 51, Issue 4, Pages: 22-30(2026)
- 作者机构：
  
  郑州大学炼焦煤资源绿色开发全国重点实验室，河南郑州 450001
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250194
  CLC： TQ211
- Received：22 April 2025，
  
  Revised：2025-05-15，
  
  Published：25 April 2026
- 稿件说明：
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孙浩淳,廖兵兵,党闪闪等.N含量对氮化铁催化剂CO₂加氢制低碳烯烃催化性能的影响[J].低碳化学与化工,2026,51(4):22-30.

SUN Haochun,LIAO Bingbing,DANG Shanshan,et al.Effects of N contents on catalytic performances of iron nitride catalysts for CO₂ hydrogenation to low-carbon olefins[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(4):22-30.
孙浩淳,廖兵兵,党闪闪等.N含量对氮化铁催化剂CO₂加氢制低碳烯烃催化性能的影响[J].低碳化学与化工,2026,51(4):22-30. DOI： 10.12434/j.issn.2097-2547.20250194.

SUN Haochun,LIAO Bingbing,DANG Shanshan,et al.Effects of N contents on catalytic performances of iron nitride catalysts for CO₂ hydrogenation to low-carbon olefins[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(4):22-30. DOI： 10.12434/j.issn.2097-2547.20250194.

摘要

通过逆水煤气反应将CO

加氢制备低碳烯烃是实现CO

转化的有效途径之一。铁基催化剂因具有适宜的加氢活性、碳链生长能力以及较低的成本，被视为候选催化剂。氮化铁催化剂作为铁基催化剂，是具有广阔前景的CO

加氢制备高价值产物的催化剂，但不同N含量的氮化铁催化剂作用下CO

加氢含碳产物分布规律依然不清晰。通过精确调控煅烧条件，成功制备了3种具有不同N含量的铁基催化剂（Na/Fe

、Na/Fe

N和Na/Fe

N），并深入研究了以上3种催化剂的CO

加氢制低碳烯烃催化性能。结果表明，在320 ℃、1.5 MPa、CO

/Ar（体积比1:3:3）混合气和空速10000 mL/(g·h)条件下反应14 h后，Na/Fe

N的低碳烯烃选择性（49.4%）高于Na/Fe

N（32.6%）和Na/Fe

（33.7%），并且Na/Fe

N的 CO选择性、碳原子数大于等于5的重质烃（C

）选择性和碳原子数为2~4的烯烃与烷烃选择性之比（O/P值）均高于Na/Fe

N，但CO

转化率低于Na/Fe

N。通过XPS表征发现反应后N

a/Fe

N中，Fe物种与Fe

的电子云密度减小，不利于低碳烯烃生成。

Abstract

One of the effective ways to achieve CO

conversion is to hydrogenate CO

to produce low-carbon olefins through reverse water gas reaction. Iron based catalysts are considered as preferred catalyst candidates due to their suitable hydrogenation activity

carbon chain growth ability and lower cost. As iron-based catalysts

iron nitride catalysts are promising catalysts for the preparation of high-value products from CO

hydrogenation. However

the distribution pattern of carbon containing products in CO

hydrogenation catalyzed by iron nitride catalysts with different N contents is still unclear. By precisely adjusting the calcination conditions

three iron-based catalysts with different N contents (Na/Fe

Na/Fe

N and Na/Fe

N) were successfully prepared

and their catalytic performances for CO

hydrogenation to low-carbon olefins were studied. The results show that under the conditions of 320 ℃

1.5 MPa

/Ar (volume ratio of 1:3:3) and space velocity of 10000 mL/(g·h)

the low-carbon olefins selectivity of Na/Fe

N (49.4%) is higher than that of Na/Fe

N (32.6%) and Na/Fe

(33.7%)

and the CO selectivity

heavy hydrocarbons with five or more carbon atoms (C

)

selectivity and ratio of olefins with two to four carbon atoms to alkanes selectivity (O/P value) of Na/Fe

N are higher than those of Na/Fe

but the CO

conversion rate is lower than that of Na/Fe

N after 14 h reaction. The XPS characterization results show that the electron cloud density of Fe species and Fe

decreases in Na/Fe

N after reaction

which is not conducive to the generation of low-carbon olefins.

关键词

Keywords

references

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Effects of N contents on catalytic performances of iron nitride catalysts for CO2 hydrogenation to low-carbon olefins

DOI：10.12434/j.issn.2097-2547.20250194

摘要

Abstract

关键词

Keywords

references

Effects of N contents on catalytic performances of iron nitride catalysts for CO₂ hydrogenation to low-carbon olefins