论文部分内容阅读
近年来文献报道,用TiO_2(锐钛矿)改性的γ-Al_2O_3,作为钼系加氢脱硫或脱氮催化剂的载体,可明显改善催化剂的性能。因此,TiO_2在γ-Al_2O_3表面上的存在状态和性质已成为重要的研究课题。我们曾对用气相吸附法制备的TiO_2/γ-Al_2O_3复合载体中的TiO_2在γ-Al_2O_3表面上的存在状态作了初步研究,发现TiO_2在γ-Al_2O_3(Sg=211.6m~2、g)表面上有一分散阈值
In recent years, it has been reported in the literature that γ-Al 2 O 3 modified with TiO 2 (anatase) can significantly improve the performance of a catalyst as a carrier for a molybdenum-based hydrodesulfurization or denitrification catalyst. Therefore, the existence state and properties of TiO_2 on γ-Al_2O_3 surface have become important research topics. We have conducted a preliminary study of the presence of TiO 2 on the surface of γ-Al 2 O 3 in a TiO 2 / γ-Al 2 O 3 composite support prepared by gas-phase adsorption. It was found that TiO 2 on the surface of γ-Al 2 O 3 (Sg = 211.6m 2, g) There is a scatter threshold