关键词: 多级孔, Ni₂P/TiO₂?Al₂O₃, 加氢脱萘, 工艺优化

Abstract: The carrier of hierarchical porous TiO₂⁃Al₂O₃ and the catalyst Ni₂P/TiO₂⁃Al₂O₃ were prepared. The catalytic performance of the Ni₂P/TiO₂⁃Al₂O₃ was compared with the N_i2P loaded on the mesoporous Al₂O₃  and γ⁃Al₂O₃. 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 Ni₂P/TiO₂⁃Al₂O₃ possessed more excellent de⁃aromatic rate and the selectivity of decahydronaphthalene compared with the ordinary catalyst of Ni₂P/γ⁃Al₂O₃ and Ni₂P/Al₂O₃. 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 Ni₂P/TiO₂⁃Al₂O₃ 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.

Key words: Hierarchical porous, Ni₂P/TiO₂?Al₂O₃, Hydrogenation naphthalene, Process optimization