Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (8): 1527-1534.doi: 10.3866/PKU.WHXB201406121

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Effect of Support on the Structural Evolution and Catalytic Performance of WO3-Supported Catalysts in the Synthesis of Adipic Acid

ZHANG Zhao-Yan1, ZHU Quan-Jing1, DING Jing1, DAI Wei-Lin1, ZONG Bao-Ning2   

  1. 1. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China;
    2. State Key Laboratory of Catalytic Materials and Reaction Engineering, Research Institute of Petroleum Processing, China Petroleum & Chemical Corporation, Beijing 100083, P. R. China
  • Received:2014-04-14 Revised:2014-06-12 Published:2014-07-18
  • Contact: DAI Wei-Lin E-mail:wldai@fudan.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2012CB224804), National Natural Science Foundation of China (21173052, 21373054), State Key Laboratory of Catalytic Materials and Reaction Engineering, China (RIPP, SINOPEC), and Science and Technology Commission of Shanghai Municipality, China (08DZ2270500).

Abstract:

A series of tungsten-based catalysts were synthesized via a traditional impregnation method using SBA-15, hexagonal mesoporous silica (HMS), and SnO2 as the support. The supported catalysts were characterized by X-ray powder diffraction (XRD), transmission electron microscopy/field-emission transmission electron microscopy (TEM/FETEM), UV-Vis diffuse reflection spectroscopy (UV-Vis DRS), Raman spectrometry, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. It was found that the support was crucial to the dispersion and nature of the tungsten species on the catalyst. In this study, the catalytic performances of catalysts with different supports were investigated for the synthesis of adipic acid (AA) from the selective oxidation of cyclohexene oxide. The excellent catalytic performance of the catalyst was obtained over WO3/SnO2, followed by WO3/HMS and WO3/SBA-15. The XRD results indicate that the degree of crystallinity of the tungsten species of WO3/SnO2 catalyst was low and the particle size of WO3 was small (~2 nm). TEM and XPS results imply a high dispersion of tungsten species on the SnO2 support. The UV-Vis DRS spectra demonstrate the existence of [WO4] and low-polymeric tungsten species. In addition, the W-based catalyst with SnO2 as the support could retain high activity, even after being reused six times, suggesting that there is strong interaction between tungsten species and the SnO2-support that enhanced the stability of the catalyst. This shows the potential of the WO3/SnO2 as a catalyst for the synthesis of adipic acid.

Key words: Tungsten oxide, SBA-15, HMS, Tin oxide, Adipic acid, High dispersion

MSC2000: 

  • O643