Study on the Ni-Cu-Based Catalyst for Amination Synthesis of Triisooctylamine from Isooctanol
Nickel-based catalysts with different nickel/copper ratios are preparing with impregnation method.The catalyst was characterized by hydrogen temperature programmed reduction(H2-TPR),ammonia temperature programmed desorp-tion(NH3-TPD),and X-ray powder diffraction(XRD),and its catalytic activity for the amination of isooctanol to synthe-size triisooctylamine was investigated.The results showed that a significant Cu diffraction peak was detected on the surface of the reduced catalyst by XRD,while the Ni diffraction peak was weaker,indicating that the Ni species were more dis-persed.H2-TPR characterization shows that the addition of copper promotes the reduction of nickel,resulting in an in-crease in reduced Ni and Cu species on the surface of the catalyst,increasing its hydrogenation and dehydrogenation capa-bilities,NH3-TPD exhibits that nickel has a better adsorption and activation effect on NH3,and copper and nickel on the catalyst exhibits synergistic adsorption on NH3.The Cu1.5Ni1/A300 catalyst has good catalytic activity,with an isooctanol conversion of 82.69％and a selectivity of 63.28％for triisooctanylamine after 4 hours of amination reaction.
NETL
NSTL
万方数据
