Highly Dispersed Ce-VOX/TiO2 Catalyst for Gas-Phase Oxidation of Durene to Pyromellitic Dianhydride
WANG Ang 1,2, GU Longqin2, FANG Min2, CHEN Bingxu2, ZHU Kake1, YANG Weimin1,2
1. School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
Abstract Ce-VOX/TiO2 catalysts with different molar ratios of cerium were prepared by impregnation method. The catalytic performance of the catalysts in the vapor-phase oxidation of durene to pyromellitic dianhydride (PMDA) was investigated. The structure of the catalysts was characterized by X-ray diffraction (XRD), Raman spectra (Raman), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and H2 temperature programmed reduction (H2-TPR). The experimental results showed that the active components of the catalysts were in a highly dispersed state. The doping of cerium increased the oxygen defect and adsorbed oxygen on the catalyst surface, which improved the catalytic performance of the catalyst without changing the existence state of VOX on the surface of TiO2. When the molar ratio of V to Ce was 1:0.1, the catalytic performance of the Ce-VOX/TiO2 catalyst was best and the yield of PMDA could reach 82.1% (mass fraction).
WANG Ang,GU Longqin,FANG Min et al. Highly Dispersed Ce-VOX/TiO2 Catalyst for Gas-Phase Oxidation of Durene to Pyromellitic Dianhydride[J]. Chemical Reaction Engineering and Technology, 2022, 38(3): 193-200.
WANG Ang,GU Longqin,FANG Min et al. Highly Dispersed Ce-VOX/TiO2 Catalyst for Gas-Phase Oxidation of Durene to Pyromellitic Dianhydride[J]. Chemical Reaction Engineering and Technology, 2022, 38(3): 193-200.
