Effect of different pretreatments on delignification pattern and enzymatic hydrolysability of miscanthus, oil palm biomass and typha grass

► Pretreatment of miscanthus, typha and empty fruit palm bunch was investigated. ► Ethanol organosolv lignins were characterized by 13C NMR and FT IR. ► Supplementation with naphthol enhances delignification ability. ► A good association was observed between S + H/G ratio and the effect of naphthol.