Study Of The Hydrotreating Catalyst And Technology For Heavy Oil

The YT-01, YT-02 and YT-03 made by Al2(SO4)3 method and WL-01 made by carbonization method and the influence of mix ratio of aluminums on the properties of carrier was investigated by BET, XRD, NH3-TPD, FT-IR and manometry. Hydrotreating carrier prepared by aluminums of Al2(SO4)3 method and carbonization method and the best ingredient ratio was 1:1. The influence of activated carbon and CMC on the physical properties of carriers was investigated. CMC was chosen as the expanding agent and the best amount of CMC was decided.YT-01 and YT-03 with WL-01 was used as raw materials, Ni-Mo-W/γ-Al2O3 catalysts for mix wax oils hydrotreating was prepared by impregnation method. XRD analysis results showed that the catalyst wasγ-Al2O3 phase, without other crystalline species and active metal well dispersed on the carrier. FT-IR and NH3-TPD results showed that the catalyst surface existed Bronsted acid and Lewis acid, while the amount of Bronsted acid was weaker, and Lewis acid centers was mainly strong acid.The feed raw materials was from Chinese Sinopec Qingdao Refining & Chemical gas oil hydrotreating unit, and the catalysts were evaluated on small-scale fixed bed hydrogenation 100mL unit. Results showed that: increasing reaction temperature can improve C01, C02 catalyst performance, and the rate of desulfurization and denitrification increased with reaction temperature. The desulfurization and denitrification rate decreased while increasing LHSV. Hydrogen oil ratio had little effects on the reactivity of the C01 and C02 catalysts. At 10MPa, 370℃, space velocity of 1.5 h-1, hydrogen to oil ratio 700:1, C01 and C02 catalysts desulfurization rate was 90%, nitrogen removal rate was 75%, and residual carbon removal rate was more than 90%. Desulfurization and denitrification activity of C01 catalyst was slightly better than that of the C02 catalyst. C01, C02 catalyst and industrial catalysts C03 were compared under the same conditions. The results showed that desulfurization activity of the C01 and C02 catalyst was better than that of C03, while denitrification activity of C01 and C02 was weaker than the reference dose.