催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (8): 753-757.

• 研究论文 • 上一篇    下一篇

LaFeO3催化剂在木质素湿法氧化合成芳香醛反应中的活性与稳定性

邓海波1,林鹿1,孙勇1,庞春生1,庄军平1,欧阳平凯2,李静江2   

  1. 1 华南理工大学制浆造纸国家重点实验室, 广东广州 510641; 2 南京工业大学制药与生命科学学院, 江苏南京 210009
  • 收稿日期:2008-08-25 出版日期:2008-08-25 发布日期:2012-06-20

Activity and Stability of LaFeO3 Catalyst in Lignin Catalytic Wet Oxidation to Aromatic Aldehydes

DENG Haibo1, LIN Lu1*, SUN Yong1, PANG Chunsheng1, ZHUANG Junping1, OUYANG Pingkai2, LI Jingjiang2   

  1. 1 State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China; 2 College of Medicine and Life Science, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Received:2008-08-25 Online:2008-08-25 Published:2012-06-20

PDF

1218

被引次数

36

摘要： 利用溶胶-凝胶法制备了钙钛矿型复合氧化物LaFeO3, 利用X射线衍射、扫描电子显微镜、X射线光电子能谱和N2吸附等表征手段考察了所制备样品的结构、形貌、表面物种和比表面积,并将其作为催化剂用于木质素湿法氧化合成芳香醛的反应中. 结果表明,该催化剂具有较高的活性和稳定性. 在适当的反应条件下, LaFeO3催化剂能显著提高木质素的转化率以及各芳香醛的产率,紫丁香醛的产率提高幅度大于香草醛和对羟基苯甲醛,紫丁香醛的最大产率是无催化剂反应时的1.85倍. 催化剂连续使用5次后仍能保持较高的活性,且体相结构没有发生明显的变化.

关键词: 钙钛矿氧化物, 木质素, 催化湿法氧化, 芳香醛, 重复使用性

Abstract: The perovskit-type oxide LaFeO3 catalyst was prepared by the sol-gel method. The structure, shape, particle size, surface species, and specific surface aera of the catalyst were characterized byX-raydiffraction, scanning electron microscopy,X-rayphotoelectron spectroscopy, and N2 adsorption. The catalyst was used for wet oxidation of lignin to aromatic aldehydes and showed high activity and stability. Compared with a non-catalytic process, lignin conversion and yield of each aromatic aldehyde increased significantly, among which the yield of syringaldehyde was the highest. The maximum yield of syringaldehyde was 1.85 times that of the non-catalytic process. The activity and perovskite-type structure of the LaFeO3 catalyst almost remained unchanged after five successive operations.

Key words: perovskite-type oxide, lignin, catalytic wet aerobic oxidation, aromatic aldehyde, reusability