上海大学学报(自然科学版) ›› 2020, Vol. 26 ›› Issue (4): 552-561.doi: 10.12066/j.issn.1007-2861.2064

• 研究论文 • 上一篇    下一篇

镁铝复合金属氧化物负载钌纳米颗粒催化HMF 选择性氧化制 FDCA

王凌晨1,2, 谌春林2, 张敏1()   

  1. 1.上海大学 理学院,上海 200444
    2.中国科学院 宁波材料技术与工程研究所,浙江 宁波 315201
  • 收稿日期:2018-04-17 出版日期:2020-08-30 发布日期:2020-01-30
  • 通讯作者: 张敏 E-mail:mzhang@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(21272153)

Ru nanoparticles supported on Mg-Al mixed metal oxide catalysts for selective oxidation of HMF methylfurfural into FDCA

WANG Lingchen1,2, CHEN Chunlin2, ZHANG Min1()   

  1. 1. College of Sciences, Shanghai University, Shanghai 200444, China
    2. Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China
  • Received:2018-04-17 Online:2020-08-30 Published:2020-01-30
  • Contact: ZHANG Min E-mail:mzhang@shu.edu.cn

摘要:

采用水热-氢气还原法合成了镁铝复合金属氧化物负载 Ru 纳米颗粒催化剂,利用 X 射线衍射(X-ray diffraction,XRD)、扫描电镜(scanning electron microscope,SEM)、透射电镜(transmission electron microscope,TEM)、N2 物理吸附、CO2-程序升温脱附(CO2-temperature programmed desorption,CO2-TPD)、电感耦合等离子体发射光谱(inductively coupled plasma-optical emission spectroscopy,ICP-OES)等表征手段对催化剂进行结构、形貌和组成分析。结果表明,镁铝物质的量之比 n(Mg):n(Al)=5:1 的催化剂载体具有最强的碱性(142.81 mmol·g-1)和较大的比表面积(97.0 m2·g-1),有利于负载高分散的 Ru 纳米颗粒。在最佳反应条件(120 、2 MPa O2、5 h)下,负载量为 2.0% 的 RO-5 催化剂能够高效催化 5-羟甲基糠醛(5-hydroxymethylfurfural,HMF)氧化制备 2,5-呋喃二 甲酸(2,5-furandicarboxylic acid,FDCA),HMF 转化率和 FDCA 产率分别达到 100.0% 和 99.0%。条件优化实验进一步证实,HMF 催化氧化的反应路径为生成 2,5-呋喃二甲醛(2,5-diformylfuran,DFF)和 5-甲酰基-2-呋喃甲酸(5-formyl-2-furancarboxylic acid, FFCA)中间产物的过程。

关键词: 镁铝复合氧化物, Ru 纳米颗粒, 氧化, 羟甲基糠醛, 呋喃二甲酸

Abstract:

Ru nanoparticles supported on Mg-Al mixed metal oxide catalysts have been prepared via the hydrothermal-reduction method. The structure, morphology and composition of the catalysts have been systematically analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), N2 physisorption, CO2-temperature programmed desorption(CO2-TPD) and inductively coupled plasma-optical emission spectroscopy (ICP-OES). The characterization results show that the highly dispersed Ru nanoparticles benefit from the strongest alkalinity (142.81 mmol·g-1 and the competitive specific surface area (97.0 m2·g-1 of mixed metal oxides with n(Mg):n(Al)=5:1. The RO-5 catalyst with Ru loading of 2.0% can efficiently catalyze aerobic oxidation of 5-hydroxymethylfurfural (HMF), obtaining 100.0% HMF conversion and 99.0% 2,5-furandicarboxylic acid (FDCA) yield under the optimal reaction condition (120 ℃ , 2 MPa O2, 5 h). According to the optimizing results, the reaction pathway for the conversion of HMF to FDCA is further confirmed for the formation of 2,5-diformylfuran,(DFF) and 5-formyl-2-furancarboxylic acid (FFCA) intermediates.

Key words: Mg-Al mixed oxide, Ru nanoparticles, oxidation, hydroxymethylfurfural, furandicarboxylic acid

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