高活性非负载型加氢催化剂的研究

使用新型方法制备了高活性非负载型Ni-W-Mo加氢催化剂，并采用X射线粉末衍射仪（XRD）、BET吸附测试法、透射电镜（TEM）对其进行了表征和分析；以甲苯和噻吩为模型化合物，对该催化剂的加氢性能和加氢脱硫性能进行了评价。结果表明，所制备的非负载型Ni-W-Mo加氢催化剂具有较多的活性中心数以及均匀分布的活性结构，显示出比负载型催化剂更高的加氢脱芳和加氢脱硫活性。以柴油为原料在中型加氢装置上对催化剂的加氢活性进行了评价，结果表明，非负载型催化剂的加氢脱硫活性可以达到工业负载型参比剂的近7倍，加氢脱氮活性为负载型参比剂的近3倍；在较为缓和的反应条件下，采用非负载型催化剂可以生产出符合欧V排放标准的清洁柴油。

STUDY ON HIGH ACTIVE UNSUPPORTED Ni-W-Mo HYDROTREATING CATALYST

A new high active unsupported Ni-W-Mo hydrotreating catalyst was synthesized and characterized by using X-ray powder diffraction (XRD), BET adsorption measurements, and transmission electron microscopy (TEM). Said unsupported Ni-Mo-W catalyst had considerable active sites and highly divided active phases, which led to its excellent thiophene hydrodesulfurization (HDS) activity and toluene hydrogenation (HYD) activity. Said unsupported catalyst was compared with a high active commercial supported catalyst on a 100 mL fixed bed pilot plant unit using Middle East straight-run diesel oil as feedstock. Test results showed that the HDS activity and HDN activity of said unsupported catalyst was almost 7 times and 3 times of the reference catalyst, respectively. Clean diesel fuel meeting the Euro-V emission standard could be obtained under relatively mild reaction conditions with said unsupported catalyst.