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Fig. 3 | Biotechnology for Biofuels

Fig. 3

From: Two-stage steam explosion pretreatment of softwood with 2-naphthol as carbocation scavenger

Fig. 3

Influence of different amounts of 2-naphthol on the enzymatic cellulose digestibility of washed pretreated spruce wood at different enzyme loadings. Pretreatment conditions: first stage: T = 180 °C, log \(R_0\) = 3.75; Second stage: T  = 230 °C, log \(R_0\) = 5. Hydrolysis conditions: t = 120h, T  = 50 °C, 1% w/w cellulose. One-stage pretreatment as comparison: T = 230 °C, log \(R_0\) = 4.8, 0.205 mol 2-naphthol/mol lignin C9-unit

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