The Synthesis of Al-SBA-16 Materials with a Novel Method and Their Catalytic Application on Hydrogenation for FCC Diesel

Abstract

A series of aluminum modified Al-SBA-16 materials with different Si and Al molar ratios (50, 40, 30, 20, and 10) were successfully synthesized through a two-step preparation method using aluminum isopropoxide as Al source. Meanwhile, the corresponding catalysts were prepared by impregnating Ni and Mo active metals on the as-synthesized samples. The hydrogenation performances of the obtained catalysts were tested under the same conditions in a fixed-bed microreactor by using FCC diesel as feedstock. Furthermore, the hydrogenation reaction conditions over the NiMo/AS-20 (Al-SBA-16 with a Si/Al ratio of 20) catalyst were studied and optimized. The as-synthesized materials and their corresponding NiMo catalysts were characterized by N2 adsorption and desorption, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, 27Al MAS NMR, UV–vis diffuse reflectance spectroscopy, temperature-programmed reduction, Pyridine Fourier transform infrared sp...