低碳化学与化工2026，Vol.51Issue(5)：54-60,103,8.DOI:10.12434/j.issn.2097-2547.20250177
草酸二甲酯加氢过程中Cu/SiO2催化剂失活机制研究
Study on deactivation mechanism of Cu/SiO2 catalyst in hydrogenation of dimethyl oxalate
杜佳奇 1李文龙 1王佳杰 1宋元江 1王小莉 1赵安民 1李扬 1胡志彪1
作者信息
- 1. 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
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摘要
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/SiO2 catalyst was selected as the model catalyst.Through stability evaluation tests,combined with characterization methods such as XRD,TEM,N2 adsorption/desorption,TGA and XPS,changes in the catalytic performances and structures of calcined,reduced and deactivated Cu/SiO2 catalysts were analyzed.The results indicate that the main causes of Cu/SiO2 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 Cu0 in the catalytic hydrogenation process,leading to catalyst deactivation.关键词
草酸二甲酯/加氢/乙二醇/Cu/SiO2催化剂/失活Key words
dimethyl oxalate/hydrogenation/ethylene glycol/Cu/SiO2 catalyst/deactivation分类
化学化工引用本文复制引用
杜佳奇,李文龙,王佳杰,宋元江,王小莉,赵安民,李扬,胡志彪..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):54-60,103,8.
