摘要
Amorphous MoNiB/γ/-Al2O3 alloy catalysts were prepared by reducing NiCI2.6H20 and （NH4）6Mo7O24.4H2O supported on γ-Al2O3 with NaBH4 as reducing agent. Using liquid-phase hydrogenation of furfural （FFR） as a probe reaction, the activity of MoNiB/γ/Al2O3 was examined. Compared to NiB and NiMoB, NiMoB/γ-Al2O3 exhibited excellent activity and selectivity towards furfuryl alcohol （FFA）. After reaction for 3.0 h at 80 ℃ and 5.0 MPa in methanol, FFR conversion reached 99% with FFA yield of 91%. The effects of doping amount of Mo and calcination temperature before NaBH4 reduction on hydrogenation activity were also investigated. The optimum Mo/Ni atom ratio and calcination temperature were found to be 1：7 and 300 ℃, respectively. XRD patterns and SEM images indicated that NiMoB over the surface of γ-Al2O3 was amorphous and highly dispersed, which was responsible for the high thermal stability of the title catalyst.
Amorphous MoNiB/γ/-Al2O3 alloy catalysts were prepared by reducing NiCI2.6H20 and （NH4）6Mo7O24.4H2O supported on γ-Al2O3 with NaBH4 as reducing agent. Using liquid-phase hydrogenation of furfural （FFR） as a probe reaction, the activity of MoNiB/γ/Al2O3 was examined. Compared to NiB and NiMoB, NiMoB/γ-Al2O3 exhibited excellent activity and selectivity towards furfuryl alcohol （FFA）. After reaction for 3.0 h at 80 ℃ and 5.0 MPa in methanol, FFR conversion reached 99% with FFA yield of 91%. The effects of doping amount of Mo and calcination temperature before NaBH4 reduction on hydrogenation activity were also investigated. The optimum Mo/Ni atom ratio and calcination temperature were found to be 1：7 and 300 ℃, respectively. XRD patterns and SEM images indicated that NiMoB over the surface of γ-Al2O3 was amorphous and highly dispersed, which was responsible for the high thermal stability of the title catalyst.
基金
The authors are grateful to the Ministry of Science and Technology of the People’s Republic of China for financial support via the National 863 Developemnt Plan (2009AA05Z401)
the Department of Science & Technology of Shandong Province for financial support from Shandong Natural Science Fund(ZR2009BL023)
