Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene
1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
Abstract Three types of Ru/TiO2 catalysts were prepared by chemical reduction impregnation method with different crystal forms of TiO2. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), NH3-temperature programmed desorption (NH3-TPD) and Fourier transform infrared spectroscopy (FTIR) were used to study the physicochemical properties of the catalysts. The catalytic performances of Ru/TiO2 catalysts in the selective hydrogenation of benzene to cyclohexene were also investigated. The results showed that the activity of benzene hydrogenation was related to the dispersion of Ru in the Ru/TiO2 catalysts. The higher the dispersion of Ru was, the higher the catalytic activity was and the selectivity of cyclohexene was negatively correlated with the acid amounts of Ru/TiO2 catalysts. The Ru/TiO2-P catalyst had the lowest acid content, the adsorption capacity of cyclohexene was the lowest, and the selectivity of cyclohexene was the highest at the same conversion rate. The kinetic analysis showed that the resulting k1/k2 ratio of the rate constants of the benzene to cyclohexene step (k1) and the cyclohexene to cyclohexane step (k2) was approximately positively correlated with the yield of cyclohexene.
Wang Leiji 1,2,Fei Zhaoyang 1 et al. Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene[J]. 化学反应工程与工艺, 2017, 33(3): 255-260.
Wang Leiji 1,2,Fei Zhaoyang 1 et al. Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene[J]. 化学反应工程与工艺, 2017, 33(3): 255-260.
