Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO<sub>2</sub> hydrogenation to C<sub>2+</sub> alcohols

SHENG Haibing; SUN Yan; SUN Qiwen

doi:10.12434/j.issn.2097-2547.20240215

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Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO₂ hydrogenation to C₂₊ alcohols

更新时间：2025-05-29

- Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO₂ hydrogenation to C₂₊ alcohols
- Vol. 50, Issue 5, Pages: 32-39(2025)
- 作者机构：
  
  上海兖矿能源科技研发有限公司煤液化气化及高效低碳利用全国重点实验室，上海 201203
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240215
  CLC： TQ016.1
- Received：15 May 2024，
  
  Revised：21 June 2024，
  
  Published：25 May 2025
- 稿件说明：
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盛海兵,孙燕,孙启文.Mn助剂对KFeCuZn催化剂结构及其CO₂加氢制C₂₊醇催化性能的影响[J].低碳化学与化工,2025,50(05):32-39.

SHENG Haibing,SUN Yan,SUN Qiwen.Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO₂ hydrogenation to C₂₊ alcohols[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(05):32-39.
盛海兵,孙燕,孙启文.Mn助剂对KFeCuZn催化剂结构及其CO₂加氢制C₂₊醇催化性能的影响[J].低碳化学与化工,2025,50(05):32-39. DOI： 10.12434/j.issn.2097-2547.20240215.

SHENG Haibing,SUN Yan,SUN Qiwen.Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO₂ hydrogenation to C₂₊ alcohols[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(05):32-39. DOI： 10.12434/j.issn.2097-2547.20240215.

摘要

加氢制C

醇（碳原子数大于等于2的醇）是CO

高值化利用及实现“碳达峰、碳中和”的重要途径之一，而催化剂的构建是实现CO

加氢制C

醇反应具有高活性和稳定性的关键。为研究Mn助剂对KFeCuZn催化剂结构和CO

加氢制C

醇催化性能（以下简称“催化性能”）的影响，采用共沉淀法制备了不同Mn添加量的KFeCuZnMn

催化剂，通过XRD、XPS、SEM、N

物理吸/脱附、H

-TPR和CO

-TPD对催化剂进行了表征，并在300 °C、3 MPa、

(CO

(Ar) = 20:60:10以及反应空速1800 h

-1

下对KFeCuZnMn

催化剂的催化性能进行了测试。结果表明，Mn作为结构助剂，适量添加的Mn会与其他金属发生不同程度的金属间相互作用，从而影响催化剂比表面积和颗粒尺寸。Mn同时作为电子助剂，与Fe发生电子转移并形成Fe-Mn-O活性相，影响了催化剂还原性能，有效提高了其催化性能。KFeCuZnMn

1.8

催化剂具有较好的金属分散性和较大的比表面积，可以暴露更多的有效活性位，其CO

转化率达到40.1%，总醇选择性达到20.3%，C

醇在总醇中的占比（质量分数）高达95.6%。因此，通过精确控制Mn添加量，可以有效调控催化剂结构，进而增大C

醇选择性。

Abstract

The catalytic hydrogenation of CO

to C

alcohols (alcohols with two or more carbon atoms) is one of the important pathways for the high-value utilization of CO

and the achievement of “carbon peak and carbon neutrality”

and the construction of catalysts is the key to achieve high activity and stability in CO

hydrogenation to C

alcohols. To investigate the effe

cts of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO

hydrogenation to C

alcohols (hereinafter referred to as “catalytic performances”)

KFeCuZnMn

catalysts with different Mn addition amounts were prepared by co precipitation method

and they were characterized by XRD

XPS

SEM

physical adsorption/desorption

-TPR and CO

-TPD. The catalytic performances of KFeCuZnMn

catalysts were tested under reaction conditions of 300 ℃

3 MPa

(CO

(Ar) = 20:60:10

and space velocity of 1800 h

-1

. The results show that Mn acts as structural additive

and moderate addition of Mn can cause varying degrees of metal to metal interactions with other metals

so as to affect the specific surface areas and particle sizes of catalysts. At the same time

as electronic additive

undergoes electron transfer between Fe

and forms Fe-Mn-O active phase

which affects the reduction performances of catalysts and effectively improves their catalytic performances. KFeCuZnMn

1.8

catalyst has good metal dispersibility and a large specific surface area

which can expose more effective active sites. Its CO

conversion rate reaches 40.1%

and total alcohol selectivity reaches 20.3%

and the proportion of C

alcohols in the total alcohols (mass fraction) is as high as 95.6%. Therefore

by precisely controlling the addition amount of Mn

the catalyst structures can be effective regulated

thereby increasing the C

alcohol selectivity.

关键词

Keywords

references

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SHENG Haibing

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Related Institution

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University

Institute of Molecular Plus of Tianjin University

China Tianchen Engineering Corporation

Coal Conversion Technology & Engineering Co., Ltd., Taiyuan University of Technology

State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Science Research

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Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO2 hydrogenation to C2+ alcohols

DOI：10.12434/j.issn.2097-2547.20240215

摘要

Abstract

关键词

Keywords

references

Effects of Mn additive on structures of KFeCuZn catalysts and their catalytic performances for CO₂ hydrogenation to C₂₊ alcohols