Table 1.

Main parameters of the hydrolysis process and range of values investigated.

Step	Parameter	Range
Pre-treatment	Mass ratio of sulfuric acid/dry cellulose (R1)	12–36
	Mass percentage of sulfuric acid (C1)	62–82 wt%
	Time (t1)	0–2 h
Partial neutralization	Acid/base molar ratio (R2)	1–3
	Concentration of base (C2)	29 wt% NH3(aq)
		20–40 wt% NaOH
Post-hydrolysis	Time (t2)	0–3 h
	Temperature (T1)	97–121°C