A previous study reported that in the hydrolysis of sugarcane
bagasse, increasing HCl concentration from 1% to 2.5% increased
the total sugar concentration in the hydrolysate from 9.89 to
21.38 g/L (Tsigie et al., 2011). However, when acid concentration
was raised to 3%, total sugar concentration obtained decreased to
17.71 g/L. This was caused by the decomposition of hexose to 5-
HMF and pentose to furfural. The highest 5-HMF and furfural concentrations
were obtained (0.83 and 0.15 g/L, respectively) when
3% HCl was used.