Figure 8

Ratios of sugar yields from co-hydroysis and SPEH for dilute acid pretreatments. Ratios of glucose plus xylose yields from co-hydrolysis to the total yield of these two sugars from SPEH for water-only pretreatment at 140°C of 2% w/w Populus slurries according to the severities and acid concentrations noted for each dataset. The error bars represent the standard errors, based on three replicates.