Synthesis, characterization, and catalytic activity of sulfided silico-alumino-titanate (Si-Al-Ti) mixed oxides xerogels supported Ni-Mo catalyst

摘要

Layered semicrystalline silico-alumino-titanate (Si-Al-Ti) mixed oxides were synthesized by a modified sol-gel method with hydrothermal synthesis temperatures less than 200 degrees C and autogenic pressure. The solid products are semicrystalline materials with a surface area of 136-367 m(2)/g and a monomodal pore size distribution with an average pore diameter of 36-47 Angstrom. The catalytic activity for pyrene hydrogenation in a batch reactor at 300 degrees C and 500 psig was determined for sulfided Ni-Mo supported on the Si-Al-Ti mixed oxide. The activity was a function of the support composition, the heat treatment before and after loading the active metals, the addition of organic templates, and different methods of metal loading. The most active sulfided Ni-Mo/Si-Al-Ti catalyst has an activity in the same range as the commercial catalyst, Shell 324, but the metal loading is 37% less than the commercial catalyst. (C) 1998 Academic Press. [References: 39]