Study on deactivation mechanism of Cu/SiO<sub>2</sub> catalyst in hydrogenation of dimethyl oxalate

DU Jiaqi; LI Wenlong; WANG Jiajie; SONG Yuanjiang; WANG Xiaoli; ZHAO Anmin; LI Yang; HU Zhibiao

doi:10.12434/j.issn.2097-2547.20250177

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Study on deactivation mechanism of Cu/SiO₂ catalyst in hydrogenation of dimethyl oxalate

更新时间：2026-05-22

- Study on deactivation mechanism of Cu/SiO₂ catalyst in hydrogenation of dimethyl oxalate
- Vol. 51, Issue 5, Pages: 54-60(2026)
- 作者机构：
  
  西南化工研究设计院有限公司多孔材料与分离转化全国重点实验室，国家碳一化学工程技术研究中心，四川成都 610225
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250177
  CLC： TQ530.2
- Received：11 April 2025，
  
  Revised：2025-06-04，
  
  Published：25 May 2026
- 稿件说明：
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杜佳奇,李文龙,王佳杰等.草酸二甲酯加氢过程中Cu/SiO₂催化剂失活机制研究[J].低碳化学与化工,2026,51(5):54-60. DOI: 10.12434/j.issn.2097-2547.20250177.

DU Jiaqi,LI Wenlong,WANG Jiajie,et al.Study on deactivation mechanism of Cu/SiO₂ catalyst in hydrogenation of dimethyl oxalate[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):54-60. DOI: 10.12434/j.issn.2097-2547.20250177.
杜佳奇,李文龙,王佳杰等.草酸二甲酯加氢过程中Cu/SiO₂催化剂失活机制研究[J].低碳化学与化工,2026,51(5):54-60. DOI: 10.12434/j.issn.2097-2547.20250177. DOI：

DU Jiaqi,LI Wenlong,WANG Jiajie,et al.Study on deactivation mechanism of Cu/SiO₂ catalyst in hydrogenation of dimethyl oxalate[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):54-60. DOI: 10.12434/j.issn.2097-2547.20250177. DOI：

摘要

草酸二甲酯加氢制乙二醇是煤炭高效清洁利用的代表性技术路线，在“碳中和”背景下受到了广泛关注。尽管该路线已实现工业化，但在目前的工业装置中仍存在催化剂易失活的问题。为研究催化剂失活机制

，选取Cu/SiO

催化剂为模型催化剂，通过稳定性评价测试，结合XRD、TEM、N

吸/脱附、TGA及XPS等表征方法，分析了煅烧、还原和失活Cu/SiO

催化剂催化性能和结构的变化。结果表明，导致Cu/SiO

催化剂失活的主要原因是Cu颗粒团聚、积炭及活性组分Cu的价态变化。其中，Cu颗粒团聚会导致暴露催化剂表面的活性位点数量减小，催化活性降低；中间产物发生一系列副反应产生的积炭会覆盖催化剂的部分活性位点，导致催化活性降低；反应过程中Cu的价态变化会导致Cu

和Cu

在催化加氢过程中的协同作用被破坏，导致催化剂失活。

Abstract

Hydrogenation of dimethyl oxalate to ethylene glycol is a representative technological pathway for the efficient and clean utilization of coal

which has garnered widespread attention under the background of “carbon neutrality”. Although the route has been industrialized

current industrial setups still face the issue of catalyst deactivation. To investigate the mechanism of catalyst deactivation

Cu/SiO

catalyst was selected as the model catalyst. Through stability evaluation tests

combined with characterization methods such as XRD

TEM

adsorption/desorption

TGA and XPS

changes in the catalytic performances and structures of calcined

reduced and deactivated Cu/SiO

catalysts were analyzed. The results indicate that the main causes of Cu/SiO

catalyst deactivation are the agglomeration of Cu particles

carbon deposition

and changes of valence state of active component Cu. Among them

the agglomeration of Cu particles can reduce the numbers of active sites exposed on the catalyst surface

leading to a decline in catalytic activity. Carbon deposition

generated through a series of side reactions of intermediate products

can cover partial active sites on the catalyst

also resulting in decreasing of catalytic activity. Changes of valence state of Cu during the reaction can disrupt the synergistic effect between Cu

and Cu

in the catalytic hydrogenation process

leading to catalyst deactivation.

关键词

Keywords

references

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Study on deactivation mechanism of Cu/SiO2 catalyst in hydrogenation of dimethyl oxalate

DOI：10.12434/j.issn.2097-2547.20250177

摘要

Abstract

关键词

Keywords

references

Study on deactivation mechanism of Cu/SiO₂ catalyst in hydrogenation of dimethyl oxalate