Hydrodeoxygenation of bio-oil model compounds over amorphous NiB/SiO2-Al2O3 catalyst in oil-water biphasic system

An amorphous NiB/SiO2-Al2O3 catalyst was prepared and characterized by XRD, TEM, N2 sorption and XPS. The hydrodeoxygenation catalytic performance of the prepared catalysts was evaluated in an oil-water biphasic system using anisole and guaiacol as model compounds of bio-oil. The results showed that Ni was in the electron-rich state with the modification of B, leading to the much higher hydrodeoxygenation activity of amorphous NiB/SiO2-Al2O3 catalyst than that of Ni/SiO2-Al2O3 catalyst. Increasing reaction temperature or prolonging reaction time was beneficial to the conversion of guaiacol and anisole. On the basis of the experimental results, the hydrodeoxygenation reaction pathways of guaiacol and anisole were analyzed, which provided a reference for the hydrodeoxygenation mechanism of bio oil.