低碳化学与化工2025，Vol.50Issue(11)：29-35,43,8.DOI:10.12434/j.issn.2097-2547.20240464
钯铋双组分催化剂的乙二醇氧化酯化制乙醇酸甲酯催化性能研究
Study on catalytic performance of palladium bismuth two-component catalyst for oxidative esterification of ethylene glycol to methyl glycolate
摘要
Abstract
The preparation of methyl glycolate from ethylene glycol as raw material by oxidative esterification is an effective way to realize high value,low carbonization and diversified utilization of ethylene glycol.Nano-gold catalyst is a kind of commonly used catalysts for oxidative esterification,but its application in the reaction is limited due to its poor activity,large amount of precious metals used and high cost.Therefore,it is necessary to develop an efficient and relatively inexpensive catalyst.A series of palladium-based catalysts were prepared by equal volume impregnation method,and their catalytic performance for oxidative esterification of ethylene glycol to methyl glycolate was investigated.It is found that the catalyst activity and product selectivity can be significantly improved by introducing the second component into the palladium-based catalyst.The catalysts were characterized by XRD,TEM,XPS and H2-TPR.The results show that the second component forms intermetallic compounds with palladium,resulting in significant changes in the electronic properties of palladium,thereby improving catalyst activity and product selectivity.The types and contents of the second component,the reduction temperature of catalyst,the ratio of raw materials and the reaction temperature were investigated.It is found that the catalyst introducing bismuth has the best catalytic performance.Under the catalysis of Pd-Bi/Al2O3 catalyst with palladium and bismuth mass fractions of 1.00%,respectively and reduction temperature of 300℃,when n(ethylene glycol)/n(Na2CO3)=200 and n(methanol)/n(ethylene glycol)=20,the ethylene glycol conversion rate reaches 88.0%and methyl glycolate selectivity reaches 90.1%(120℃,4 h).关键词
乙二醇/乙醇酸甲酯/氧化酯化反应/钯基催化剂Key words
ethylene glycol/methyl glycolate/oxidative esterification reaction/palladium-based catalyst分类
化学工程引用本文复制引用
苗昱露,杨培达,商雪航,张军营,贾松岩,黄家辉..钯铋双组分催化剂的乙二醇氧化酯化制乙醇酸甲酯催化性能研究[J].低碳化学与化工,2025,50(11):29-35,43,8.基金项目
中国科学院战略性先导科技专项(XDA29030500) （XDA29030500）
