中文摘要：

采用水热合成法制备了镁铝尖晶石（MgAl2O4）材料,制备了其负载的Ru催化剂,研究了MgAl2O4焙烧温度对Ru/MgAl2O4催化剂上液相苯部分加氢催化性能的影响.采用X射线粉末衍射、27Al固体核磁共振、傅里叶变换红外光谱、H2-程序升温还原、H2-程序升温脱附、N2物理吸附、透射电子显微镜和X射线光电子能谱等手段对催化剂进行了系统的表征.结果表明,在较低的焙烧温度（773K）下即可制得很好尖晶石晶型的MgAl2O4材料.载体焙烧温度对催化剂结构和Ru粒径等有显著的影响.1023K焙烧的MgAl2O4负载的Ru催化剂上环己烯选择性及收率最高,分别可达52.4%和38.5%.结合催化剂的表征和反应结果,对载体焙烧温度影响催化剂活性和选择性的原因进行了讨论.

英文摘要：

The MgAl2O4 material was synthesized by the hydrothermal method. A series of Ru/MgAl2O4 catalyst samples were prepared using this MgAl2O4 calcined at different temperatures. The catalyst samples were characterized by powder X-ray diffraction, 27Al solid-state nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, temperature-programmed reduction, temperature-programmed desorption, N2 physisorption, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was found that the spinel phase readily formed at calcination temperature as low as 773 K. The calcination temperature of MgAl2O4 strongly influenced the structural properties of the catalyst. In the liquid-phase partial hydrogenation of benzene, the Ru/MgAl2O4 catalyst sample calcined at 1023 K exhibited the highest cyclohexene selectivity and yield. The maximum cyclohexene yield was 38.5% and the corresponding selectivity was 52.4%. Based on the characterization results, the effect of the calcination temperature of MgAl2O4 on the activity and selectivity of Ru/MgAl2O4 catalyst samples was discussed.