不同镍源NiMoS/γ-Al_2O_3催化剂的柴油加氢精制性能

Hydrorefining of Diesel Oil over NiMoS/γ-Al_2O_3 Catalysts with Different Nickel Sources

制备了不同镍源的NiMoS/γ-Al2O3加氢精制催化剂,并对其进行了XRD,H2-TPR,HRTEM表征;以直馏柴油和催化裂化柴油的混合油为原料,在100 mL高压固定床柴油加氢精制装置上评价了催化剂的加氢精制性能。实验结果表明,在反应温度340℃、氢分压6.0 MPa、氢油体积比500∶1、液态空速1.5 h-1的工艺条件下,以次磷酸镍为镍源的NiMoS/γ-Al2O3催化剂上的脱硫率达到98.4%,脱氮率达到99.6%,其加氢精制性能略优于两种参比催化剂,这可能与其活性相具有较高的堆积层数和活性位密度有关。

A series of NiMoS/γ-Al2O3 catalysts with same Ni and Mo contents were prepared from different nickel sources and characterized by means of XRD, H2-TPR and HRTEM. The performances of the catalysts for diesel oil hydrorefining were evaluated in a fixed-bed microreactor. The results indicate that the hydrodesulfurization ratio and hydrodenitrogenation ratio are 98.4% and 99.6% respectively under the mild operation conditions of temperature 340℃, hydrogen partial pressure 6.0 MPa, H2/Oil volume ratio 500 ： 1 and LHSV 1.5 h-1. The comprehensive performance of the NiMoS/γ-Al2O3 catalyst with Ni（H2PO02 as nickel source is better than those of the reference catalysts, which may be correlated with the high density of active sites and high stacking number of MoS2 phase.