载体对MoP催化剂HDN、HDS和HYD性能的影响  

EFFECT OF SUPPORTS ON HDS, HDN AND HYD ACTIVITIES OVER MOLYBDENUM PHOSPHIDE CATALYSTS

作　　者：赵天波[1] 赵志芳[2] 李凤艳[2] 孙桂大[2] 李翠清[2] 

机构地区：[1]北京理工大学理学院,北京100081 [2]北京石油化工学院应用化学系,北京102617

出　　处：《石油学报（石油加工）》2005年第2期86-91,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(20273011);国家重大基础研究项目(G2000048003)资助

摘　　要：探讨了TiO2、SiO2(B)、SiO2(H)和γAl2O34种载体对负载型MoP催化剂加氢精制活性的影响。采用XRD、NH3TPD和TG DTG手段对MoP催化剂进行了表征。以噻吩、吡啶和环己烯为模型化合物,用高压连续微反装置评价MoP催化剂的加氢脱氮(HDN)、加氢脱硫(HDS)和加氢降烯烃(HYD)性能,反应温度为340℃和370℃,反应压力为3.0MPa。结果表明,在同样的制备条件下,MoP在各载体表面的分散情况明显不同。通过对4种负载型磷钼酸盐前体的程序升温还原过程(TPR)进行分析,发现以γAl2O3为载体的MoP催化剂,其DTG曲线在温度>400℃后只出现单峰;而其它载体负载的MoP催化剂其DTG曲线在温度>400℃后则出现多峰。在340℃时,以γAl2O3为载体的MoP催化剂的HDN、HDS和HYD效果最优。在370℃时,以TiO2为载体的MoP催化剂的HDN、HDS和HYD效果最优。The effects of four types of supports (TiO2, SiO2(B), SiO2(H) and γ-Al2O3) on hydroprocessing activities of supported molybdenum phosphide catalysts were studied. Catalysts were characterized by means of XRD, NH3-TPD and TG-DTG analyses. The evaluation of the HDN, HDS and HYD properties of MoP catalysts was carried out in a continuous-flow reactor at 340°C, 370°C and 3.0 MPa pressure, using a hydrocarbon mixture containing thiophene, pyridine and cyclohexene as the model compounds. Results showed that the dispersion of MoP on the four types of supports were different. TG-DTG analysis showed that only one peak in the DTG curve of γ-Al2O3 supported molybdenum phosphate catalyst, while there were several in the rest three precursors. γ-Al2O3 was a suitable support for preparing molybdenum phosphide catalyst at 340°C; as for preparing MoP/TiO2 catalyst, the temperature was 370°C.

关 键 词：磷化钼 载体 加氢脱硫 加氢脱氮 加氢降烯烃 

分 类 号：O643.38[理学—物理化学]