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Fig. 3 | Biotechnology for Biofuels

Fig. 3

From: Pilot-scale steam explosion pretreatment with 2-naphthol to overcome high softwood recalcitrance

Fig. 3

Influence of biomass impregnation with 2-naphthol before steam explosion pretreatment on enzymatic cellulose digestibility. a Steam explosion pretreatment without additive (control) and with 2-naphthol impregnation using acetone as solvent. b Steam explosion pretreatment without additive (control) and with 2-naphthol impregnation using ethanol as solvent. Solvents were removed by evaporation before the pretreatment. Digestibility is expressed as glucose yield of pretreated biomass content. Pretreatment conditions: T = 235 °C, t = 2.5–20 min, Δp explosion = 30 bar, 1.5 kg wood chips, 35.36 g 2-naphthol; hydrolysis conditions: 1% w/w cellulose, 15/30/60 FPU g−1 cellulose

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