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MoVOx催化甘油选择性氧化性能研究

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通过添加亮氨酸/谷氨酸制备了 MoVOx复合金属氧化物,考察了亮氨酸/谷氨酸添加浓度对MoVOx晶相组成及含量的影响.将制备的MoVOx用于催化甘油选择性氧化性能研究.研究表明,添加亮氨酸/谷氨酸能够抑制产物中V2O5的生成.与谷氨酸相比,添加亮氨酸可以进一步减少产物中MoO3的含量.此外,当添加谷氨酸摩尔比为Mo∶V∶Glu=1∶1∶0.5时制备的MoVOx呈现出特殊的多层片状结构,该样品(MoN/Glu-0.5)在催化甘油选择性氧化反应中表现出优异的性能,当催化反应温度为340℃时,甘油的转化率为98.17％,丙烯醛和丙酮选择性分别为45.96％和34.84％.此时,体系中MoV2O8和MoO3的含量分别为65.56％和34.44％,表明MoVOx催化甘油选择性氧化反应中MoV2O8和MoO3具有明显的协同效应.
MoVOx Catalyzes Selective Oxidation of Glycerol
MoVOx complex metal oxides were prepared by adding leucine/glutamic acid,and the effects of leucine/glutamic acid concentration on the crystalline composition and content of MoVOx were investigated.The prepared MoVOx was used to catalyze the selective oxidation of glycerol.Studies have shown that the addition of leucine/glutamic acid can inhibit the production of V2O5 in the product.The addition of leucine can further reduce the amount of MoO3 in the product compared to glutamate.In addition,when the molar ratio of glutamate was Mo∶V∶Glu=1∶1∶0.5,the MoVOx prepared showed a special multilayer sheet structure,and the sample(Mo/V/Glu-0.5)showed excellent performance in catalyzing the selective oxidation of glycerol,with the conversion rate of glycerol being 98.17％,and the selectivity of acrolein and acetone being 45.96％and 34.84％,respectively,when the catalytic reaction temperature was 340 ℃.At this time,the contents of MoV2O8 and MoO3 in the system were 65.56％and 34.44％,respectively,indicating that MoV2O8 and MoO3 had obvious synergistic effects in the selective oxidation of glycerol catalyzed by MoVOx.

MoVOx composite metal oxidescrystalline phase compositionregulationcatalytic glycerol oxidation

于晓君、李双明、张思琪、苏天月、于三三、张嘉欣

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沈阳化工大学化学工程学院,辽宁沈阳 110142

MoVOx复合金属氧化物 晶相组成 调控 催化甘油氧化

沈阳市中青年科技创新人才支持计划辽宁省"兴辽英才计划"科技创新领军人才项目辽宁省应用基础研究计划辽宁省教育厅基本科研项目

RC210184XLYC20020012023JH2/101300243JYTMS20231497

2024

10.16084/j.issn1001-3555.2024.02.006

分子催化
中国科学院兰州化学物理研究所

分子催化

CSTPCD北大核心
影响因子：2.622
ISSN：1001-3555
年,卷(期)：2024.38(2)