Pd/Ni/Al2O3的表征及对重整重芳烃油加氢反应催化性能的评价

采用混捏-浸渍法制备具有相同载Pd量的Pd/Al2O3和Pd/Ni/Al2O3催化剂，并对制得的催化剂进行XRD，BET，NH3-TPD表征。在固定床连续微反装置上，对制得的催化剂进行重整重芳烃油选择性加氢反应催化性能评价。结果表明，Pd/Ni/Al2O3催化剂具有γ-Al2O3物相、适宜的比表面积与孔径分布以及较小的酸量，对重整重芳烃油中烯烃选择性加氢具有较好的反应性能和稳定性，适宜的反应条件为：温度80 ℃，压力5 MPa，空速2 h-1，氢油体积比500。

CHARACTERIZATION AND CATALYTIC PERFORMANCE EVALUATION OF Pd/Ni/Al2O3 CATALYST FOR HYDROGENATION OF HEAVY REFORMING AROMATIC OIL

Pd/Ni/Al2O3 and Pd/Al2O3 catalysts having the same Pd content were prepared by kneading-impregnating method and characterized by XRD,BET and NH3-TPD techniques.The selective hydrogenation performance of the prepared catalysts was evaluated on a fixed bed continuous micro-reactor device using heavy reforming aromatic oil as feed.Test results showed that Pd/Ni/Al2O3 catalyst having γ-Al2O3 phase,suitable specific surface area and pore size distributions with less acid amount,exhibited better selectivity to olefin conversion and stability in selective hydrogenation of heavy reforming aromatic oil as compared with Pd/Al2O3 catalyst.The optimum reaction conditions were as follows: a reaction temperature of 80 ℃,a reaction pressure of 5 MPa,LHSV of 2 h-1 and H2/oil volume ratio of 500.