采用"沉积沉淀-化学镀"法制备了Ni₃P/γ-Al₂O₃催化剂,利用X射线衍射(XRD)、N₂-物理吸附和透射电镜(TEM)对催化剂进行表征。考察了催化剂制备条件以及反应条件对Ni₃P/γ-Al₂O₃催化肉桂醛(CAL)选择加氢反应性能的影响。结果表明,负载量为25%、镀液pH为5.5制备的催化剂前体,经400℃下H₂热处理后获得的催化剂具有最高的苯丙醛(HCAL)收率。在70℃和1.0 MPa H₂下反应1 h,肉桂醛转化率为93.7%,苯丙醛选择性为90.1%。

Ni₃P/γ-Al₂O₃ catalysts are prepared through deposition-precipitation followed by electroless plating,and characterized by means of powder X-ray diffraction (XRD),N₂-adsorption/desorption isotherms,and transmission electron microscope (TEM).The effects of catalyst preparation conditions and reaction conditions on the performance of Ni₃P/γ-Al₂O₃ in selective hydrogenation of cinnamaldehyde are investigated.The results show that a thermal treatment to the catalyst precursor prepared with a loading of 25 wt%,and pH of 5.5 in H₂ at 400℃ can lead to a highly dispersed Ni₃P/γ-Al₂O₃ catalyst,which affords the highest yield to hydrocinnamaldehyde.The conversion of cinnamaldehyde is 93.7% and the selectivity of hydrocinnamaldehyde is 90.1% after the reaction has performed at 70℃ and 1.0 MPa H₂ for 1 h.

黄卉(1997-),女,硕士研究生,研究方向为生物质加氢,31907083@mail.dlut.edu.cn