Figure 8

Phenolic compounds in hydrolysate generated by flowthrough and batch pretreatment of Populus trichocarpa x P. deltoides wood samples. Cumulative release of phenolic compounds from flowthrough pretreatment (20 mL/min) are plotted as a function of time: (a) 140°C, 12 min; (b) 140°C, 192 min; (c) 180°C, 12 min; (d) 180°C, 192 min. Distribution of primary phenolic compounds after batch pretreatment: (e) at 140°C for 192 min and (f) at 180°C for12 min.