金属有机骨架衍生的钒碳催化剂催化氧化乳酸乙酯制备丙酮酸乙酯  

Catalytic Aerobic Oxidation of Ethyl Lactate to Ethyl Pyruvate over Metal-organic Framework-derived Carbon-supported Vanadium Catalysts

作　　者：李江[1] 王溪梦 李晨[1] 张文燕 LI Jiang;WANG Xi-meng;LI Chen;ZHANG Wen-yan(College of New Energy and Materials,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)新能源与材料学院,北京102249

出　　处：《化学试剂》2023年第10期61-69,共9页Chemical Reagents

基　　金：国家重点研发计划项目(2022YFB3506200);国家自然科学基金项目(21702227);中国石油大学(北京)科学基金项目(2462014YJRC037,2462020YXZZ018)。

摘　　要：化石能源的过度开发利用造成的能源危机和环境问题促使研究人员尝试利用可再生能源来生产增值化学品。生物质作为一种来源丰富的可再生有机碳源,可用于转化制备许多有价值的化工产品。其中可通过乳酸氧化制备的丙酮酸备受关注,可用于制备各种工业产品,如香水、食品添加剂、药品等。金属有机框架材料(MOF)由于其高度多样化的结构、高比表面积和可调节的孔径而成为近10年来备受关注的材料,可用于制备活性催化剂或载体。在本工作中,MOF衍生的钒基碳材料被用于催化乳酸乙酯有氧氧化为丙酮酸乙酯。在最佳条件下,MOF-5衍生的钒催化剂的乳酸乙酯转化率为95.72%,丙酮酸乙酯选择性为67.10%。经过多次循环,该催化剂具有良好的稳定性。实验及表征结果表明:V^(5+)/V^(4+)物种的比例,而非孔道结构,是决定催化性能的关键。The energy crisis and environmental problems caused by over-exploitation and utilization of fossil energy have made the researchers to attempt the utilization of renewable energy to produce value-added chemicals.As an abundant renewable organic carbon source on earth,biomass can be converted into many value-added chemicals.Among them,pyruvate,which can be prepared by oxidation of lactic acid,has attracted much attention and can be used to prepare various industrial products,such as perfumes,food additives,pharmaceuticals,etc.Metal-organic frameworks(MOF)are highly appealing materials in last decade due to the highly diversified structure,high specific surface area,and adjustable pore size.They can also be used to prepare active catalysts or supports.In this work,MOF-derived vanadium-based carbonaceous materials were used to catalyze aerobic oxidation of ethyl lactate to yield ethyl pyruvate.Under optimal conditions,the conversion of ethyl lactate reached 95.72%using MOF-5-derived vanadium catalyst,while the selectivity of ethyl pyruvate was 67.10%.The catalytic performance of the catalyst remained unchanged after multiple cycles,demonstrating the good stability.The experimental and characterization results suggested that the ratio of V^(5+)/V^(4+)species,instead of pore structure,played a critical role in determining the catalytic performance of the V catalyst.

关 键 词：生物质 钒基碳材料 金属有机骨架 乳酸乙酯 丙酮酸乙酯 有氧氧化 

分 类 号：O65[理学—分析化学]