In recent years, the development of photocatalytic desulfurization catalyst has been a hot topic in the field of clean fuel production. The preparation method, structure, properties and catalytic desulfurization performance of pure phase, doped, supported and heterojunction photocatalytic oxidation desulfurization catalysts were studied. Due to the narrow light response range of pure phase catalysts, doped, loaded and heterogeneous junction catalysts have the expanded light wave region by reducing the bandgap width of catalysts. It is pointed out that the supported catalyst can not only expand the range of light wave range, but also increase the specific surface area of the catalyst and then further improve the activity of it. However, the study of low cost carriers and the regeneration performance of photocatalytic oxidation desulfurization catalysts are important research directions in the future.

The carrier of hierarchical porous TiO ₂⁃Al ₂O ₃ and the catalyst Ni ₂P/TiO ₂⁃Al ₂O ₃ were prepared. The catalytic performance of the Ni ₂P/TiO ₂⁃Al ₂O ₃ was compared with the N _i2P loaded on the mesoporous Al ₂O ₃  and γ⁃Al ₂O ₃. The influence of the technological conditions, including reaction temperature, hydrogen oil ratio, mass space velocity and reaction pressure, were investigated by Orthogonal test and single factor exploration, respectively. The optimized technological conditions were obtained. The results showed that the hydrogenation catalyst Ni ₂P/TiO ₂⁃Al ₂O ₃ possessed more excellent de⁃aromatic rate and the selectivity of decahydronaphthalene compared with the ordinary catalyst of Ni ₂P/γ⁃Al ₂O ₃ and Ni ₂P/Al ₂O ₃. For the de⁃aromatic rate and the selectivity of decahydronaphthalene, the reaction pressure and temperature had more significantly affection to the hydrogen / oil ratio and the mass space velocity. According to the results of orthogonal test, the optimum reaction conditions of the hierarchical porous Ni ₂P/TiO ₂⁃Al ₂O ₃ catalyst in the hydrodeaphthalene reaction were investigated. The reaction temperature was 300 ℃, the reaction pressure was 4 MPa, the hydrogen / oil ratio was 500, and the mass space velocity was 1 h-1. The removal rate of naphthalene and the selectivity of decahydronaphthalene reached the highest, which were 99.2% and 72.0%, respectively.