Abstract:
In order to improve the activity and stability of Ni-based catalysts in the reductive amination of furfural, NiPd/SiO
2 bimetallic catalysts were prepared by the co-impregnation method and used for the reductive amination of furfural to furfurylamine using an aqueous ammonia solution and molecular hydrogen as an amine source and a reducing agent, respectively.The effects of Ni/Pd molar ratio, reaction temperature, hydrogen pressure and catalyst dosage on furfural conversion and furfurylamine selectivity were investigated.Meanwhile, the reusability and the universality of the catalyst were studied.The results show that a complete conversion of furfural and 91.6%furfurylamine yield were achieved over the optimal NiPd(1∶4)/SiO
2 catalyst under the reaction conditions of 130 ℃ and 2 MPa H
2 for 3 h.Furthermore, the catalyst still shows good activity after four recycle times.Additionally, the catalyst exhibits high performance in the reductive amination of various aldehydes to the corresponding primary amines.