Effect of activation temperature on the surface copper particles and catalytic properties of Cu-Ni-Mg-Al oxides from hydrotalcite-like precursors

摘要

The Cu-Ni-Mg-Al oxides catalysts for furfural hydrogenation were prepared from the hydrotalcite-like precursors, and the effect of activation temperature on the Cu~0 particles and catalytic properties of the catalyst was thoroughly investigated. The catalyst activated by H2 at 300 ℃ was found to exhibit the best catalytic activity, due to the presence of the smallest Cu~0 particles with a high dispersion. Moreover, the bigger Cu~0 particles were active for furfuralcohol hydrogenolysis to 2-methylfuran in the liquid-phase (ethanolic solution), and the hydrogenation of the furan ring of furfuralcohol and 2-methylfuran on Cu~0 particles was easily achieved in the vapour-phase.