Enhanced hydroconversion of lignin-derived oxygen-containing compounds over bulk nickel catalysts though Nb2O5 modification

摘要: A series of bimetallic Nb–Ni oxide catalysts with different Nb/Ni molar ratio have been prepared by chemical precipitation method. XRD, Raman and XPS results indicate that amorphous Nb2O5 species exist in the samples a about 0.087. The as-synthesized oxides effectively promote dispersion NiO active components, as result inhibit agglomeration particles. Ni0.92Nb0.08O sample largest surface area 173 m2/g mainly consists fold-like nanosheets are well-dispersed all over bulk NiO. After reduction hydrogen, Nb-promoted nickel display better catalytic performance for hydrodeoxygenation lignin-derived anisole to biofuels than Ni catalyst. selectivity deoxygenated products using Ni0.92Nb0.08 catalyst increases 2.5 fold at 160 °C 3 MPa H2, synergistic effect between metal sites. In addition, further increase reaction temperature 200 °C, deoxygenation almost goes quantitatively. High-specific-surface-area precipitation, excellent HDO compounds. Selectivity folds