Pt／Al2O3-TiO2催化剂制备及其对重整抽余油的加氢性能

STUDY ON THE PREPARATION OF Pt/Al_2O_3-TiO_2 CATALYST FOR HYDROGENATION OF REFORMATE RAFFINATE

制备了不同焙烧温度的Al2O3-TiO2载体,采用浸渍法得到相应的Pt/Al2O3-TiO2催化剂,采用BET,XRD,TPR,TEM及氢氧滴定等方法对所制备的催化剂进行表征,以重整抽余油为原料进行烯烃和芳烃加氢活性评价。结果表明:用于重整抽余油加氢的Pt/Al2O3-TiO2催化剂的优化制备条件为载体焙烧温度900℃、催化剂焙烧温度350℃、催化剂还原温度200℃;该催化剂的加氢活性随着反应温度的升高而提高;在反应温度200℃、反应压力3.0 MPa、氢油体积比200∶1、体积空速2.0 h-1的条件下,重整抽余油的烯烃和芳烃转化率均达到100%。

Pt/Al2O3-TiO2 catalysts were prepared by impregnation method using Al2O3-TiO2 sup ports calcined under various temperatures. The prepared catalysts were characterized by BET, XRD,TPR, TEM and H2-O2 titration techniques,and the activity of catalysts for olefin and aromatic hydrocarbon hydrogenation was evaluated using reformate raffinate as feedstock. Results showed that the optimum preparation conditions of Pt/Al2O3-TiO2 catalyst for hydrogenation of reformate raffinate were as follows： support calcination temperature of 900℃ ,catalyst calcination temperature of 350℃ and reduction temperature of 200℃. The hydrogenation activity of Pt/Al2O3-TiO2 catalyst increased with the increase of reaction temperature. Under a reaction temperature of 200℃,a reaction pressure of 3.0 MPa, hydrogen/oil volume ratio of 200 and LHSV of 2.0 h^-1 , over PtAl2O3-TiO2 catalyst prepared with optimum conditions,the conversions of olefin and aromatic hydrocarbon in reformate raffinate reached 100%.