Simulating
lignocellulose-derived pyrolysis oil, the effects of
carbohydrate derivatives on the hydrodeoxygenation of lignin-derived
phenolic compounds, guaiacol in this study, were observed using supported
ruthenium catalysts. Among several carbohydrate derivatives which
possibly exist in the pyrolysis oil, the addition of furfural and
5-hydroxymethylfurfural (5-HMF) significantly decreased the
conversion of guaiacol, with density functional theory (DFT) calculations
indicating that guaiacol competes with furfural and 5-HMF to adsorb
onto the ruthenium nanoparticle surface, thus suppressing the hydrogenation
of guaiacol.
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