非负载型催化剂上柴油深度加氢脱硫工艺条件研究

采用水热合成法制备了非负载型Ni-Mo-W催化剂并对其进行表征，研究催化裂化（FCC）柴油在该催化剂上的深度加氢脱硫过程，考察反应温度、反应压力、空速和氢油比等工艺条件对柴油深度加氢脱硫效果的影响，并与工业化NiMo/Al2O3催化剂的加氢活性进行对比。结果表明，在反应温度为340 ℃、反应压力为6.0 MPa、空速为1.5 h-1、氢油体积比为600的条件下，非负载型Ni-Mo-W催化剂可使胜华FCC柴油的脱硫率达到99.84%，脱氮率达到99.96%，与工业化NiMo/Al2O3催化剂相比，非负载型Ni-Mo-W催化剂具有更高的加氢活性。

STUDY ON HYDRODESULFURIZATION PROCESS OF DIESEL ON UNSUPPORTED CATALYST

Nowadays, deep hydrodesulfurization (HDS) of diesel fractions has become one of the most important approaches for production of clean fuels, as increasingly stringent quality standards of diesel fuel has been made all around the world. In the present work, operation conditions such as temperature, hydrogen pressure, liquid hourly space velocity (LHSV) and H2/oil volume ratio during the deep HDS of FCC diesel on an unsupported Ni-Mo-W catalyst were investigated, and activity of Ni-Mo-W catalyst was compared with a commercial NiMo/Al2O3 catalyst. The results show that reaction temperature, pressure, H2/oil ratio and LHSV made great influence on HDS efficiency of diesel fraction, and The reaction conditions of temperature 340 ℃, pressure 6.0 MPa, LHSV 1.5 h-1, and H2/oil ratio 600 were clarified to be the appropriate conditions for Shenghua FCC diesel hydrotreating on the unsupported Ni-Mo-W catalyst. The sulfur removal of the FCC diesel on the unsupported catalyst was 99.84%, and the nitrogen removal efficiency can reach up to 99.96%, much higher than that of the reference catalyst.