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Fig. 6 | Biotechnology for Biofuels

Fig. 6

From: Characterization of lignin derived from water-only and dilute acid flowthrough pretreatment of poplar wood at elevated temperatures

Fig. 6

Characterization of ReL in pretreated solid residues by FTIR (800–2000 cm−1). Control: untreated poplar wood; A solid residues from 0.05 % (w/w) sulfuric acid pretreatment at 240 °C for 2.6 min; B solid residues from water-only pretreatment at 230 °C for 3.8 min; C solid residues pretreated with 0.05 % sulfuric acid at 240 °C for 5 min

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