Ni-Mo-W型与Co-Mo型催化剂多环芳烃选择性加氢饱和工艺研究

以催化裂化柴油为原料,采用Ni-Mo-W/γ-Al_2O_3与Co-Mo/γ-Al_2O_3加氢精制催化剂,在中型加氢实验装置上,考察加氢工艺参数对两种类型催化剂多环芳烃选择性加氢饱和反应的影响。结果表明:在相同反应温度条件下,Ni-Mo-W型的多环芳烃饱和活性优于Co-Mo型的多环芳烃饱和活性;Co-Mo型的单环芳烃选择性与单环芳烃产率优于Ni-Mo-W型的单环芳烃选择性与单环芳烃产率;并且Ni-Mo-W型催化剂多环芳烃选择性加氢饱和性能更容易受到工艺参数的影响。为实现高多环芳烃饱和率下单环芳烃的产率最大化,芳烃饱和性能较高的Ni-Mo-W型催化剂适合选择较低的反应温度,芳烃饱和性能较低的Co-Mo型催化剂适合选择中等的反应温度和较高的反应压力。

SELECTIVITY OF HYDRO-PROCESSES FOR POLY-RING AROMATICS HYDROGENATION SATURATION ON Ni-Mo-W/Al2O3 AND Co-Mo/Al2O3 CATALYSTS

The influence of hydro-processing parameters on poly-ring aromatics saturation of FCC light cycle oil over Ni-Mo-W/γ-Al2O3 and Co-Mo/γ-Al2O3 catalysts was studied in a pilot plant. The results show that Ni-Mo-W catalyst has a higher aromatics saturation activity than Co-Mo catalyst at the same reaction temperature；the mono-ring aromatics selectivity and yield on Co-Mo catalyst is generally better than that of Ni-Mo-W catalyst; and the selective saturation performance of Ni-Mo-W catalyst is more susceptible to the processing parameters. To realize the high rate of poly-ring aromatics saturation and the maximization of mono-aromatics yield, lower reaction temperature is better for Ni-Mo-W catalyst, while Co-Mo catalyst is suitable for the reaction at moderate reaction temperature and higher reaction pressure.